Development 2

Question 1

exchange of gases, nutrients and wastes

maternal: decidua basalis
fetal: chronic villi

Answer 1

placenta

Question 2

protects embryo, helps eliminate waste, fluid released when water breaks

Answer 2

amnion

Question 3

produces blood until liver forms, germ cells form here and migrate to gonads

Answer 3

yolk sac

Question 4

first evidence of gastrulation….

Answer 4

primitive streak

Question 5

first set of ingressing cells displace the hypoblast to form…

Answer 5

endoderm

Question 6

2nd set of cells ingress to form…

Answer 6

mesoderm

Question 7

forms skin, hair, nose, sinuses, mouth, anus, nervous system

Answer 7

ectoderm

Question 8

forms muscles, bones, spleen, blood cells, lungs, repro/excretory systems

Answer 8

mesoderm

Question 9

tongue, tonsils, urethra, associated glands, bladder and digestive tract

Answer 9

endoderm

Question 10

epiblast becomes…

Answer 10

ectoderm

Question 11

Day 17, mesenchymal cells move through primitive streak and aggregate to form… (mesodermal cells in midline)

Answer 11

notochord

Question 12

notochord provides signal to begin…

Answer 12

neurulation

Question 13

neural plate buckles in to form the…

Answer 13

neural tube

Question 14

neural folds fold dorsally to…

Answer 14

seal off the neural tube

Question 15

made from ectoderm cells that differentiate into neural cells

Answer 15

neural plate

Question 16

forms muscles, limbs, and vertebrate

Answer 16

somites

Question 17

spinal cord comes from

Answer 17

neural tube

Question 18

high ventral, low dorsal

Answer 18

shh

Question 19

low ventral, high dorsal

Answer 19

BMP