Sentence examples for yolk formation from inspiring English sources

In these species the cell membranes of the oocyte and granulosa cells have many microvilli (i.e., fingerlike projections), which probably facilitate transport of substances important in yolk formation from the blood vessels to the egg.

The nurse cells provide nourishment for the oocytes during the early stages of their growth; follicular cells, which invest the enlarging oocyte as a continuous epithelium, provide the materials for yolk formation and, in the final stages, lay down the eggshell or chorion.

The two cycles overlap as vitellogenesis (yolk formation) begins while the female is still pregnant.

Unlike most sharks, in which vitellogenesis (yolk formation) occurs concurrently with pregnancy, in the angelshark the onset of vitellogenesis is delayed until halfway through the gestation period.

Females ovulate eggs into the uterus about once every two weeks; vitellogenesis (yolk formation) and the growth of new ovarian eggs halt during pregnancy, apparently due to insufficient space inside the body cavity.

Vitellogenesis, the process of yolk formation and accumulation, is central to oogenesis and ovarian maturation.

Hadjantonakis et al. made the same observation for yolk sac formation in vivo[ 19].

Dicer-deficient mice die during early embryonic development and display impaired angiogenesis and yolk sac formation [ 4], whereas endothelial-specific inactivation of Dicer reduces postnatal angiogenesis [ 5].

At a later stage during blastoderm formation, yolk clusters containing nuclei were detected.

It is interesting that slc3a2 was shown to control yolk syncytial layer formation and microtubule distributions (Takesono et al., 2012).

A number of important components of oogenesis were discussed in relation to identified ESTs including egg envelope formation, yolk proteolysis, oocyte hydration, and lipid metabolism.