yolk cell मीनिंग इन हिंदी

उदाहरण वाक्य

1. The main specialized female reproductive organs are an ovary that produces eggs and a vitellarium that produces yolk cells.
2. This layer forms when the cells at the vegetal pole of the blastoderm combine with the yolk cell underneath it.
3. The blastoderm begins to thin as it spreads toward the vegetal pole of the embryo until it has completely engulfed the yolk cell.
4. Once epiboly is complete, the DEL, EVL, and YSL have engulfed the yolk cell, forming a closure known as the blastopore.
5. Yolk cells travel in a duct system to the oviduct, where, in a modified region, the ovum is enclosed in a shell with yolk cells.
6. Yolk cells travel in a duct system to the oviduct, where, in a modified region, the ovum is enclosed in a shell with yolk cells.
7. In most other flatworms, yolk cells, where present at all, are typically formed in a gland derived from the ovary, but separate from it.
8. It is connected via a pair of ducts to a number of " vitelline glands " on either side of the body, that produce yolk cells.
9. They are distinguished from other flatworms by the presence of four nerve cords and the fact that the ovary forms a single structure that both produces the ovum and nourishing yolk cells.
10. After the egg is surrounded by yolk cells, its shell is formed from the secretion of another gland called Mehlis'gland or shell gland, the duct of which also opens in the ootype.