Embryology Pt 1

Question 0

Zygote

Answer 0

a new cell formed from the union of two gametes (egg and sperm)

Question 1

Embryo

Answer 1

organism in the early stages of growth and differentiation, extends from fertilization to the end of the 8th week

Question 2

mitosis

Answer 2

the process of division of the chromosomes and then the division of the cytoplasm to form two identical cells; 2, 4, 8 cell stage

Question 3

morula

Answer 3

12 to 16 cells about the third day after fertilization

Question 4

blastocyst

Answer 4

when the cells begin to separate into two masses and attaches to the uterine lining

Question 5

trophoblast

Answer 5

becomes the placenta

Question 6

inner cell mass

Answer 6

becomes the embryo

Question 7

week two

Answer 7

cell differentiation in two three layers: ectoderm, mesoderm, and endoderm.

Question 8

ectoderm

Answer 8

epidermis of skin, teeth, nervous system, hair, nails, epithelial tissue

Question 9

mesoderm

Answer 9

connective tissue: bones, muscles, blood vessels, and cartilage.

Question 10

endoderm

Answer 10

epithelial lining of digestive and respiratory tract.