Question

Match in sequential order 46. blastocoel A 47. neural tube 48. notochord C 49. primitive streak 50. morula a. e- 51 hypomere 52. germinal disk 53. gastrocoel 54. neurocoele a. 55. blastodiskA d. e.
46-55

Answer 1

46. A blastocoel( also soelled blastocoele and blastocele) is a fluid filled cavity that forms in the animal hemispere of early amphibian and echinoderm embryos, or between the epiblast and hypoblast of avian, reptilian, and mammalian blastoderm stage embryos.

47.A neural tube in an embryo a hollow structure from which the brain and spinal cord form. defects in its development can result in congential abnormalities such as spina bifida.

48. Notochord is a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals.

49. Primitive streak is the faint streak which is the earliest trace of the embryo in the fertilized ovum of a higher vertebrate.

50. Morula is a solid ball of cells resulting from divison of a fertilized ovum, and from which a blastula is formed.

51.Hypomere is the portion of the myotome that extends ventrolaterally to form body wall and limb muscle, innervated by the primary ventral raus of a spinal nerve, less commonly the somatic and splanchnic layers of the lateral mesoderm which give rise to the lining of the celom.

52.Germinal disc, also called as blastodisc, is a small, circular, white spot on the surface of the yellow yolk of the birds egg.

53. Gastrocoel is the cavity of the gastrula of an embryo forming a primitive gut called also gastrocoel.

54. Neurocoel is the cavity of the chordate cerebrospinal system, consting of the ventricles of the brain and the central canal of the spinal cord regarded as a unit origin of neurocoel.

55. blastocoel is the embryo forming portion of an egg with discoidal cleavage usually appearing as a small disc on the upper surface of the yolk mass.