Definition of Yolk sack. Meaning of Yolk sack. Synonyms of Yolk sack

Here you will find one or more explanations in English for the word Yolk sack. Also in the bottom left of the page several parts of wikipedia pages related to the word Yolk sack and, of course, Yolk sack synonyms and on the right images related to the word Yolk sack.

Definition of Yolk sack

Yolk sack
Yolk Yolk (y[=o]lk or y[=o]k; 277), n. [OE. yolke, yelke, [yogh]olke, [yogh]elke, AS. geoloca, geoleca, fr. geolu yellow. See Yellow.] [Written also yelk.] 1. The yellow part of an egg; the vitellus. 2. (Zo["o]l.) An oily secretion which naturally covers the wool of sheep. Yolk cord (Zo["o]l.), a slender cord or duct which connects the yolk glands with the egg chambers in certain insects, as in the aphids. Yolk gland (Zo["o]l.), a special organ which secretes the yolk of the eggs in many turbellarians, and in some other invertebrates. See Illust. of Hermaphrodite in Appendix. Yolk sack (Anat.), the umbilical vesicle. See under Unbilical.

Meaning of Yolk sack from wikipedia

- bubble nest. In 1–2 days, the eggs hatch and continue to absorb their yolk sack for 2 days. After that, the fry became free to swim. Until then, the male...
- The newly hatched larva is about 2.5 mm (0.098 in) long with a large yolk sack. Little is known about king mackerel in their first year of life. Yearling...
- bubble nest. In 1 to 2 days, the eggs hatch and continue absorb their yolk sack for 3 to 4 days. In 4 to 5 days, the fry become free swimming. Until this...
- eaten their skin for the first time, relying on the remains of their yolk sack for nutrition. Though the export of wild crested geckos is now prohibited...
- predator, they are released in the day after the nutrients from their yolk sack are used up, and predators can easily spot them on the trek to the ocean...
- paramecium culture, crushed flakes, and rotifers after they have used all the yolk sack. On the fourth day a very small portion of newly hatched brine shrimp...
- 14 mm (0.43 to 0.55 in) long, and 10–14 days later when they absorb their yolk sack, the length is 18 to 20 mm (0.71 to 0.79 in). Thereafter, the larvae usually...
- even stay to see them develop into fry. Once born, the fry will have a yolk sack attached to their underbelly, which is typically gone in a few days. The...
- continue to carry the yolk sack beyond the anterior margin of the head. This continues until the 4th day after hatching where the yolk sack is completely absorbed...
- evolve was probably the allantois, a sack that develops from the gut/yolk-sack. This sack contains the embryo's nitrogenous waste (urea) during development...