Рк2 (26-50)

Letter A

• Zygote

• Spermatozoon

• Ovary

• Blastocoels

• Blastoderm

The yolk sac:

• protects the embryo from tremors

• poorly developed in humans

• the main role in human is the feeding of the fetus

• the main function is the nutrition of the fetus

• not developed in humans and bird

Cleavage:

• can be holoblastic (total or entire) or meroblastic (partial)

• the development of an individual organism or anatomical or behavioral feature from the earliest stage to maturity

• the process in which spermatozoa are produced from male primordial germ cells by way of mitosis and meiosis

• the creation of an ovum (egg cell)

• the fusion of gametes to initiate the development of a new individual organism

   

Ectoderm derivative:

• Epithelium of auditory tube

• Hepatocyte

• Acinar cell of mammary gland

• Spleen

• Acinar cell of sublingual gland

The yolk sac performs in humans this function:

• Trophic

• Hormonal

• Respiratory

• Excretory

• Secretory

Germ layer:

• Embryoblast

• Chorion

• Blastoderm

• Epiderm

• Ectoderm

Ectoderm derivative:

• Spleen

• Hepatocyte

• Acinar cell of sublingual gland

• Retina

• Epithelium of auditory tube

Ovulation:

• it development begins from the ninth week after fertilization and continues until birth

• is the unborn offspring of an animal that develops from an embryo

• it development begins from the fertilization of the female egg cell by the male sperm cell until the ninth week

• is the stage of pregnancy at which the embryo adheres to the wall of the uterus

• is the release of eggs from the ovaries

The main earliest embryogenesis phase:

• larval

• external

• viviparity

• internal

• cleavage

What is the last yellow-blue structure (labelled with the letters D, F, G, and H) called?

• Cross sector

• Ectoderm

• Endoderm

• Blastula

• Gastrula