Home
Search results “Sea urchin fertilization”
Developmental biology part 4 : sea urchin fertilization
 
33:19
For more information, log on to- http://shomusbiology.weebly.com/ Download the study materials here- http://shomusbiology.weebly.com/bio-materials.html Fertilisation (also known as conception, fecundation and syngamy) is the fusion of gametes to initiate the development of a new individual organism.[1] In animals, the process involves the fusion of an ovum with a sperm, which eventually leads to the development of an embryo. Depending on the animal species, the process can occur within the body of the female in internal fertilisation, or outside (external fertilisation). The cycle of fertilisation and development of new individuals is called reproduction. Sperm find the eggs via chemotaxis, a type of ligand/receptor interaction. Resact is a 14 amino acid peptide purified from the jelly coat of A. punctulata that attracts the migration of sperm. After finding the egg, the sperm penetrates the jelly coat through a process called sperm activation. In another ligand/receptor interaction, an oligosaccharide component of the egg binds and activates a receptor on the sperm and causes the acrosomal reaction. The acrosomal vesicles of the sperm fuse with the plasma membrane and are released. In this process, molecules bound to the acrosomal vesicle membrane, such as bindin, are exposed on the surface of the sperm. These contents digest the jelly coat and eventually the vitelline membrane. In addition to the release of acrosomal vesicles, there is explosive polymerisation of actin to form a thin spike at the head of the sperm called the acrosomal process. The sperm binds to the egg through another ligand reaction between receptors on the vitelline membrane. The sperm surface protein bindin, binds to a receptor on the vitelline membrane identified as EBR1. Fusion of the plasma membranes of the sperm and egg are likely mediated by bindin. At the site of contact, fusion causes the formation of a fertilisation cone. Source of the article published in description is Wikipedia. I am sharing their material. Copyright by original content developers of Wikipedia. Link- http://en.wikipedia.org/wiki/Main_Page
Views: 45286 Shomu's Biology
Sea Urchin Fertilization
 
01:45
This 3D animation describe the sea urchin fertilization at cell biology level.
Views: 91015 Lei Jin
Fertilization in sea urchin | Developmental biology lecture
 
24:13
Fertilization in sea urchin- This developmental biology lecture explains about the fertilization process in sea urchin. It also explains the polyspermy prevention in sea urchin development. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 LinkedIn - https://www.linkedin.com/in/suman-bhattacharjee-2a051661 Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching
Views: 12953 Shomu's Biology
Sea Urchin Fertilization
 
02:58
Views: 24494 bluedoorlabs
When the egg meets sperm
 
02:23
PLEASE, subscribe! I have other exciting videos! A exciting story from sea urchin life. I added the sperm at 27 sec, and at 59 sec the envelope already started to form! Isn't that fantastic? This is the "real close-up" porn - under the microscope! Fertilization of the sea urchins happen externally and the lifecycle is fast and predictable. Оплодотворение яйцеклетки морского ежа. Сперматозоиды добавлены на 27-й секунде. 受精 私は27秒で精子を追加しました
Views: 3104887 The Lucky Urchin
Sea urchin fertilization
 
03:51
This video is about fertilization in sea urchins. It was a project i did for my animal biology class.
Views: 2119 Jordan Cox
Sea urchin fertilization
 
00:10
This is a movie of sea urchin egg fertilization (species: Lytechinus variegatus). Note that you can see the sperm fertilizing each egg, including both the head and the tail. Also note the formation of a fertilization cone around the sperm after initial contact with the egg. Sperm binding initiates a series of intracellular signaling events that result in the elevation of the fertilization envelope (clear membrane surrounding the fertilized egg). The fertilization envelope prevents the egg from being fertilized by more than one sperm (a fatal event) and protects the developing embryo during early development. It takes about 1-2 minutes for the fertilization envelope to rise completely after sperm binding.
Views: 33802 Mariana Leguia
Sea urchin fertilization 2
 
03:51
This video is about animal
Views: 504 Jordan Cox
Fertilization in sea urchins
 
08:38
Sea urchin sperm and egg do their thing to music.
Views: 448 mantismundi
General Embryology - Detailed Animation On Fertilization
 
03:34
Animation is derived from Primal Anatomy & Physiology Online Course. You may purchase the course at http://primalonlinelearning.com/ Fertilization is the process whereby genetic material from a male and female gamete fuse to form a single diploid nucleus. It normally takes place in the ampullary region of the uterine tube. Shortly after ejaculation, spermatozoa swim from the vagina to the uterine cavity via the cervix, propelled by whip-like motions of their flagella. Of the 200 million spermatozoa found in each ejaculation, approximately 3-5 hundred will reach the secondary oocyte. The secondary oocyte cannot be fertilized until capacitation and the acrosomal reaction have taken place, which can take several hours. During capacitation, two changes occur to the spermatozoa. First, the flagella beat more quickly triggered by the accompanying seminal secretions. Second, vaginal secretions promote the removal of glycoproteins and seminal plasma proteins from the heads of the spermatozoa, resulting in the membrane becoming more fluid, in preparation for the events of fertilization. A spermatozoon must penetrate two layers before it can fertilize the secondary oocyte. These layers are the corona radiata, composed of granulosa cells and the deeper zona pellucida, made up of glycoproteins. Spermatozoa penetrate down to the zona pellucida where they bind to a sperm-receptor molecule called ZP3 glycoprotein, triggering the acrosomal reaction. During this process, the acrosome releases acrosomal enzymes, which digest the zona pellucida and allow the spermatozoa to cross the perivitelline space, the space between the zona pellucida and the oocyte membrane. The head of the first spermatozoon to reach the plasma membrane of the secondary oocyte fuses with it. Fusion of the spermatozoon and oocyte membranes activates two mechanisms that help prevent polyspermy, or fertilization of the secondary oocyte by more than one spermatozoon. These are a fast and a slow block to polyspermy. During fast block to polyspermy, the oocyte membrane depolarizes, preventing other spermatozoa from fusing with the membrane. This activity stimulates slow block to polyspermy. During slow block to polyspermy, a wave of intracellular calcium is released, causing the secondary oocyte to release cortical granules by exocytosis, rendering ZP3 inactive, and making the zona pellucida impermeable. Immediately after the fusion of the spermatozoon and oocyte membranes, the nucleus of the spermatozoon containing haploid genetic material and associated centrioles is released into the cytoplasm of the secondary oocyte. Upon the spermatozoon entering, the oocyte undergoes meiosis II, and develops into the female pronucleus. During this time, the tail of the sperm detaches and degenerates, and the spermatic nucleus develops into the male pronucleus. The two pronuclei then fuse to form a single cell with a diploid nucleus. This cell is known as a zygote.
Views: 255811 Embryology
How to get sperm and eggs from a sea urchin
 
03:34
Explanation on how to get eggs and sperm from the sea urchins.
Views: 13526 The Lucky Urchin
Sea Urchin Cleavage
 
10:46
Views: 7651 Biology Videos
Fertilization in Four Easy Steps
 
05:54
This is a short description of the four major steps of fertilization in most animals, including mammals and sea urchins.
Views: 21676 ZamoXC
Fertilization in Sea urchin......
 
10:52
Acrosomal reactionand brief detail
Views: 171 ONLINE TEACHING OT
Sea Urchin Gamete Extraction & Fertilization
 
02:02
They are model organisms
Views: 357 Divine Photography
Sea Urchin egg developing until gastrula
 
08:34
Fertilization of sea urcin and early embryo development shown by time-lapse filming.
Views: 21824 SuperMikroskop
08 06SeaUrchinTimeLapse SV
 
01:01
Sea Urchin Embryonic Development (time lapse) Video This series of video clips shows selected important events in sea urchin embryonic development. 1) The unfertilized egg is about 100 micrometers (µm) in diameter, similar to that of humans, and is surrounded by an extracellular layer called the vitelline layer. Upon fertilization by the first sperm, the vitelline layer becomes raised off the surface of the egg and hardens, forming the protective structure known as the fertilization envelope. All cleavages up to the blastula stage occur within this envelope. 2) During first cleavage, the nuclear envelope breaks down, and the duplicated chromosomes separate into two complete sets, followed by cytokinesis. In the two new cells, or blastomeres, you can clearly see the two new nuclei. 3) Second cleavage, progressing from 2 to 4 cells, is seen here. Cleavages will proceed synchronously, approximately every 30 minutes, passing through the morula stage (16-64 cells) when the cells are loosely attached to each other, up to the blastula stage (more than 128 cells). 4) The blastula stage is seen at the end of this clip. This stage is made up of a hollow ball of 1000 or so cells, arranged in a single-layered epithelium. The cells are tightly packed together, maintaining a space in the center called the blastocoel cavity. 5) At the beginning of gastrulation, a number of cells in the flattened "vegetal pole," shown here at the bottom of the embryo, move as individual cells into the blastocoel cavity. In this cavity the cells migrate around, fuse with each other in a ring, and begin secreting elements of the calcium carbonate skeleton of the embryo. Because these cells are the first to move as individual cells in the embryo, they are called the primary mesenchyme cells (PMCs). The remaining cells in the vegetal pole fill in the gaps, restoring a complete epithelial sheet. 6) While the PMCs are migrating around, archenteron formation, or formation of the embryonic digestive tract, begins. The first stage involves the pushing in of the vegetal pole to form a short, wide, blind-ended tube. 7) This tube then narrows and elongates by a process that includes extensive cell rearrangement. Following this elongation, a subset of cells (secondary mesenchyme cells) at the tip of the archenteron will extend processes that contact a specific site on the inside of the ectodermal wall and tow the archenteron toward that spot. The wall of the ectoderm will bend inward and fuse with the tip of the archenteron to form the mouth. The digestive tract will differentiate into an esophagus, a stomach, and an intestine, and the embryo will begin to feed. Four to 8 or 12 arms will extend, supported by internal skeletal elements. This feeding larva will float around in the plankton, eating algal cells, for 5 or 6 weeks, then will metamorphose into the adult form of the sea urchin. Credit: Rachel Fink, editor, "A Dozen Eggs," Society for Developmental Biology
Views: 15223 Chandra Brown
Live Sea Urchin Egg Fertilization I Sexplorations I AFTER DARK I Exploratorium
 
13:43
Catch one of the After Dark: Sexplorations highlights from February 6, 2014! Watch as Exploratorium Biologists, Karli Woodward and Caitlin Johnson demonstrate a live sea urchin fertilization. Learn why scientists have long used these spiny marine organisms as a model for studying fertilization and development across species. To learn more about the Exploratorium, please visit: www.exploratorium.edu
Views: 11651 Exploratorium
Sea Urchin Fertilization Lab
 
01:20
Sea Urchin-Lex Cat Sav
Views: 1693 Lexi Gifford
SJP 09 Urchin fertilization
 
00:36
Biomedical Fellows in the MBL's Logan Science Journalism Program add sea urchin sperm to eggs and watch the fertilization process. Video by Diana Kenney
Views: 38 MBL Woods Hole
Sea urchin Fertilization
 
02:31
ウニの卵がどのようにして多精を防ぐかに関わる動画です。Mechanism to prevent polyspermy of sea urchin
Views: 3361 Takaetu Inoue
Sea Urchin Fertilization
 
04:38
Developmental Biology extra credit video project Song: Big Data-"Dangerous" All music rights go to respective artists
Views: 360 Baylee Asher
Sea urchin fertilization calcium wave
 
00:11
Here, five unfertilized sea urchin eggs have been microinjected with a calcium indicator (and a tiny oil droplet to mark injected eggs). Sperm binding to the egg initiates a signaling cascade that results in the release of calcium from intracellular stores. Calcium release begins at the point of sperm contact and propagates through the cell as a wave. One of the consequences of calcium release is exocytosis of cortical granules and elevation of the fertilization envelope. Eventually, calcium is reabsorbed back into intracellular stores.
Views: 24500 Mariana Leguia
prep sea urchins for fertilization
 
03:58
In our experiment, we retrieved sperm and eggs from the sea urchins. We injected potassium chloride into the soft membrane around the mouth of the sea urchin. The sea urchins gender sex are unknown until they oozed at milky substance (sperm) or a yellow translucent substance (eggs) into the "ocean water".
Views: 216 onetodrawtootoo
Sea Urchins Divide!
 
01:09
Soon after fertilization, we watch as two new sea urchin zygotes divide (mitosis) through eight cycles of synchronized division right up to the point of gastrulation. One can see the nuclei as dark spots in the 'green' cytoplasm. Scale bars and times are included, along with some strange sounds recorded in the deep. Imaged via dark-field microscopy. I apologize for the shaking in the middle - we had to add more sea water to prevent the slide from drying out.
Views: 20339 thesoundofscience
Sea urchin development
 
43:59
This developmental biology lecture explains about the sea urchin development including the sea urchin fertilization, prevention of polyspermy and the blastula and gastrulation of sea urchin embryo to produce the adult sea urchin animal. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 LinkedIn - https://www.linkedin.com/in/suman-bhattacharjee-2a051661 Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching
Views: 12394 Shomu's Biology
Sea Urchin Fertilization
 
01:19
Fertilization of eggs of the sea urchin species Strongylocentrotus purpuratus and formation and elevation of the fertilization membrane. Real time. View full screen.
Views: 13745 BioIrvine
Sea urchin fertilization
 
00:21
Fertilization in the sea urchin, Lytechinus pictus. MBL biomedical journalism program, 2011.
Views: 2039 Kate Travis
Sea Urchin Fertilization Envelope Formation
 
00:18
Fertilization of Strongylocentrotus purpuratus gametes.
Views: 19 Victor Hung
urchin fertilization
 
04:14
Views: 5 deffaj
Sea Urchin Fertilization
 
00:31
Sea Urchin Fertilization
Views: 869 GoAstros5
Sea Urchin Fertilization
 
01:41
The very strange life of a biology professor. Collecting sperm for sea urchin fertilization.
Views: 1042 Kitrina Carlson
@amoonlitartman [Oh glorious. Sea urchin fertilization? ...]
 
00:13
@amoonlitartman [Oh glorious. Sea urchin fertilization? I will be covered with eggs & sperm for the morning. Um, eeeeeeewwwww! http://twitvid.com/80E2A] posted October 7th 2009 12:27pm from TwitVid - http://twitvid.com/80E2A
Views: 72 amoonlitartman
Early development in sea urchins
 
05:17
Fertilization and mitosis in early embryo to cover song of 'Nobody Does it Better'... by Carly Simon.
Views: 1530 mantismundi
Sea Urchin Fertilization
 
00:25
Sea Urchin Fertilization
Views: 386 GoAstros5
How to Spawn a Sea Urchin
 
02:52
This short video shows how we obtain eggs and sperm from the tropical sea urchin Lytechinus variegatus. Students Tess Bender and Jessie Spears have been using these eggs and sperm to examine the effects of temperature and salinity of fertilization success.
Views: 4705 CollinLabPanama
Sea Urchin Fertilization
 
00:14
By Nem & Tin
Views: 18 Christine Alayon
Sea Urchin Fertilization
 
00:15
Sea Urchin Fertilization
Views: 267 GoAstros5
Sea urchin fertilization
 
00:26
Egg fertilization
Views: 84 Alaina Garza