yolk sac in English
The eggs take about 20 weeks to hatch and the now free-swimming ray is still reliant upon its yolk sac for a few more weeks before it begins to feed upon shrimps.
Use "yolk sac" in a sentence
1. The yolk sac is gradually vascularized.
2. Without the yolk sac the alevin cannot survive.
3. In early spring, yolk-sac fry, or Alevins, hatch
4. Meckel's diverticulum is the rudiment of the embryonic yolk sac.
5. The results showed that more than80%of nutrition in yolk sac were utilized in59hours, which suggested that it was the main period of yolk sac utilization.
6. By two months, the yolk sac becomes redundant and shrivels away.
7. Distinctive marks formed at yolk-sac absorption, initiation of feeding and settlement.
8. The successfully fertilised eggs and the yolk sac larvae survive well, normally above # %
9. Objective To study the diagnosis and recognition of yolk sac tumor of testis.
10. The Allantois is an extension of the posterior wall of the yolk sac
11. Until about three months in the womb, baby sharks feed off a yolk sac.
12. Young Arrowana should not have a yolk sac - and be seen feeding before purchase.
13. Two other structures that develop at this time are the amnion and the yolk sac .
14. Before the yolk-sac completely disappears, the tiny fish must become capable of feeding themselves.
15. The gonads form from a group of large granulated yolk sac cells which invacle ridges.
16. ALEVINS: From January to the Spring, the eggs hatch and feed from their yolk sac.
17. The second transition is hatching, and the former embryo becomes an Alevin or yolk-sac fry.
18. Along with the yolk sac absorption, stomach and duodenum, were differentiated 3 days post hatch, respectively.
19. Alevin that leave the gravel before their yolk sac is completely absorbed are commonly called button-up fry.
20. AFP production appears to cease synchronously in the liver and yolk sac during the 8th week of gestation.
21. The yolk sac will produce blood and help to nourish the embryo until the placenta takes over that role .
22. The Allantois forms from the part of the fetal yolk sac that eventually becomes the primitive hindgut (the cloaca).
23. The Allantois forms from the part of the fetal yolk sac that eventually becomes the primitive hindgut (the cloaca)
24. Methods The yolk sac in 129 pregnant women were measured by ultrasonography, and compared in normal and abnormal pregnancy group.
25. The secondary yolk sac( YS ) is the first extraembryonic structure that can be detected with ultrasonography in the chorionic cavity.
26. A modified method of extracting and purifying rickettsiae from infected chicken embryo yolk sac by differential centrifugations and Ether treatment.
27. Neither the length of the yolk sac phase nor the length of the emergence period among alevins was affected by photoperiod.
28. Results Methylmercury could pass through yolk sac placenta quickly, and inhibit placenta development and blood vessel differentiation there at higher concentration.
29. ‘Inside the egg are a series of fluid-filled membranes which permit the embryo to survive: the Amnion, allantois, yolk sac, and chorion.’
30. In conjoined twins, a single Chorionic sac, yolk sac and a single triangularly shaped embryonic pole may be imaged at 6 weeks of gestation
31. The typical lesions observed were yolk sac edema, vertebra defect, craniofacial malformations (double head, triple retina), Anaxial body and inhibition of swim bladder inflation
32. Blood is manufactured by the yolk sac for six weeks; then the liver takes over this function, which is finally assumed by the bone marrow.
33. It develops from an outer fold on the surface of the yolk sac. In insects the Chorion is the outer shell of the insect egg.
34. The Allantois grows rapidly and within ten days completely surrounds the embryo and yolk sac and fills the extra-embryonic coelom between the amnion and chorion
35. First, though, a crucial process has to take place —their yolk sac has to begin moving through their umbilical cord and navel into their tiny abdomen.
36. ‘In mid spring, after the larval fish has absorbed its yolk sac, it emerges as an Alevin and proceeds to find suitable habitat for the summer period.’.
37. I do not believe, however, that this is normal, since in the wild, young with such a large yolk sac probably would not survive without parental protection.
38. This yolk-sac allows the Alevin to attain a relatively large size in the first month or so of its life and eliminates the total dependence on feeding.
39. This yolk-sac allows the Alevin to attain a relatively large size in the first month or so of its life and eliminates the total dependence on feeding
40. Aplacental vivipary, embryos feed on uterine milk after using up yolk sac; litter size possibly 4-7; size at maturity 1.1 ft disc width for males, 1.3 ft for females.
41. Alpha fetoprotein (AFP) is a protein produced by the liver in a developing baby (fetus) and the portion of a developing embryo that is similar to the yolk cavity in bird eggs (yolk sac tissues) during pregnancy
42. Allantois [ah-lan´to-is] a small sausage-shaped outpouching from the caudal wall of the yolk sac of the early embryo, associated with early blood formation and development of the urinary bladder; its blood vessels become the umbilical arteries and veins
43. Allantois [ah-lan´to-is] a small sausage-shaped outpouching from the caudal wall of the yolk sac of the early embryo, associated with early blood formation and development of the urinary bladder; its blood vessels become the umbilical arteries and veins
44. Vasculogenesis vs Angiogenesis Formation of blood vessels from differentiating angioblasts and their organization into a primordial vascular network, consisting of the major blood vessels of the embryo Angioblast cells Vasculogenesis Primitive vascular plexus Progression blocked in yolk sac Intussusceptive Angiogenesis in the absence Of endoglin.
45. The key difference between amnion and Allantois is that amnion is the innermost thin membrane that surrounds the developing embryo or fetus, forming a hydrostatic cushion, while Allantois is an extension of the posterior wall of the yolk sac, and lies between the amnion and chorion.
46. ‘Initially, the bladder is continuous with the Allantois.’ ‘Inside the egg are a series of fluid-filled membranes which permit the embryo to survive: the amnion, Allantois, yolk sac, and chorion.’ ‘The Allantois is a structure that collects the waste that the embryo produces before it hatches.’
47. ‘In mid spring, after the larval fish has absorbed its yolk sac, it emerges as an Alevin and proceeds to find suitable habitat for the summer period.’ ‘After 90-150 days (depending on temperature) the eggs hatch, and the Alevins (fry with yolksacs attached to the underside) stay in …