Navigation Links
Yolk


yolk
stored food in the egg's cytoplasm
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Full article >>>

Yolk
[ME yolke - the yolk, the yellow part]. Nutritive stores found within the ovum cytoplasm consisting of proteins and fats.
Full article >>>

membrane-bound discs containing high concentrations of yolk found in eggs.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Full article >>>

yolk sac The stored food reserve (yolk) and its surrounding membranes, which is found in embryonic reptiles, birds, and mammals.
Back to PAE Glossary ...
Full article >>>

yolk sac
One of four extraembryonic membranes that supports embryonic development; the first site of blood cells and circulatory system function.
Z ...
Full article >>>

yolk sac - the first of four extraembryonic membranes of amniotes to form during embryogenesis. Like the allantois, it arises from the splanchnopleure (endoderm and splanchnic mesoderm) to surround the mass of yolk in reptile and bird eggs.
Full article >>>

yolk sac An extraembryonic membrane enclosing and absorbing the yolk of amniote embryos. It is formed from a layer of endoderm and a layer of splanchnic mesoderm (splanchnopleure).
Full article >>>

yolk plug
In amphibians, when the opening of the archenteron, the blastopore, is filled with yolk-rich cells, it is called the yolk plug.
Z ...
Full article >>>

amnion
yolk sac
chorion, and
allantois
In birds and most reptiles, the embryo with its extraembryonic membranes develops within a shelled egg.
Full article >>>

The shape of the early embryo is a result of different yolk concentrations in the eggs. Birds' and reptiles' eggs are heavily yolked. Their eggs develop similarly to amphibians except the yolk has deformed the shape of the embryo.
Full article >>>

By the end of the 8th division most nuclei have migrated to the surface, surrounding the yolk sac (leaving behind only a few nuclei, which will become the yolk nuclei).
Full article >>>

Lecithotrophic larva. A planktonic-dispersing larva that lives off yolk supplied via the egg
Leeward. The side of an island opposite from the one facing a persistent wind ...
Full article >>>

Separation of the embryo
The yolk-sac
Development of the fetal membranes and placenta
The branchial region
Development of the body cavities
The form of the embryo at different stages of its growth ...
Full article >>>

About 5000 nuclei accumulate in the unseparated cytoplasm of the oocyte before they migrate to the surface and are encompassed by plasma membranes to form cells surrounding the yolk sac.
Full article >>>


'"/>


See more about: Yolk

TAG: Yolk
Other biology dictionary
(Date:10/13/2008)...st Generation of Mobile Data Software, WALL, N.J....ational,Inc. (OTC Bulletin Board: BKYI), a leader...less public safety, announced today $245,000 in,ad...rvices orders that,closed at the end of the third ...ird quarter orders were comprised of awards from n...
(Date:10/13/2008)...to spot even mildly lame sheep, but many do not ta...r flocks by catching and treating these animals. A...Research is the first to provide evidence for the...sting that farmers have one of the skills required...ditions in their flocks. , Footrot, one of the m...
(Date:10/13/2008)...rsyth Institute, working with collaborators at Tuf...ew control over embryonic stem cells, behavior. Th...chanism within frog embryonic stem cells and trigg...l growth, change in cell shape, and invasion of th...trical signals are a powerful control mechanism th...
(Date:10/13/2008)...ase patients had insufficient levels of vitamin D ...icine. , The fraction of Parkinson,s patients w...ficantly more than patients with Alzheimer,s disea...ent). , The results are published in the October... adds to evidence that low vitamin D is associated...
Breaking Biology News(10 mins):BIO-key(R) Announces Additional $245,000 in Third Quarter Public Safety Orders 2BIO-key(R) Announces Additional $245,000 in Third Quarter Public Safety Orders 3Farmers can spot lame sheep, but fail to prevent footrot spread 2Forsyth scientists trigger cancer-like response from embryonic stem cells 2Lack of vitamin D linked to Parkinson's disease 2Lack of vitamin D linked to Parkinson's disease 3U S FDA Issues Action Letter for Sugammadex 2765 1U S FDA Issues Action Letter for Sugammadex 2765 2HealthFitness Guides Incentives Strategy to Spark Participation in American Electric Power 26apos 3Bs Employee Health and Wellness Initiative New Issu 24849 1HealthFitness Guides Incentives Strategy to Spark Participation in American Electric Power 26apos 3Bs Employee Health and Wellness Initiative New Issu 24849 2HealthFitness Guides Incentives Strategy to Spark Participation in American Electric Power 26apos 3Bs Employee Health and Wellness Initiative New Issu 24849 3Omega to Hold Conference 3A Autism Through the Life Span II 24844 1Omega to Hold Conference 3A Autism Through the Life Span II 24844 2Omega to Hold Conference 3A Autism Through the Life Span II 24844 3Turned off cannabinoid receptor turns on colorectal tumor growth 24841 1Turned off cannabinoid receptor turns on colorectal tumor growth 24841 2Turned off cannabinoid receptor turns on colorectal tumor growth 24841 3
...such as the stem nematode, and fungi, such as whit... the Netherlands: they cause rot. Soil samples are...nd expensive operation. Together with the Laborato...ompany Blgg has developed a molecular technique to...mples. , Agricultural laboratory Blgg will start ...
...d that Intelligent Design theorists have in Americ...l Ruse, a leading American evolutionist, makes the...e, "Darwin or Design? Reporting from the front lin...rant Museum for Zoology at UCL (University College..., Professor Ruse, Florida State University, will a...
...aking new study examines the origins of holiday gi... frequently altruistic. , "Reciprocity is arguabl..." writes Michael Gurven (University of California ... the contingent relationship between acts of givin... is important because it sets the rules for who qu...
...rofessor of psychological and brain sciences Peter...estigation of the brain and how it transforms visu... "Visibility, visual awareness, and visual masking...s in the occipital cortex beyond human V1/V2," is ...l, The Proceedings of the National Academy of Scie...
Other Biology News:DNA technique measures suitability of soil for onion crops 2'Creationism is not science' ?making the case for Darwin at UCL 2Finding the mind's eye 2