Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
Stages of Human Development
|
1) Pre-embryonic
2) Embryonic 3) Fetal |
|
|
How long does it take for implantation to being?
|
about 24 hours
|
|
|
Day 0=
|
Fertilization
|
|
|
Day 2=
|
Cleavage
|
|
|
Day 4=
|
Morula
|
|
|
Day 6=
|
Blastocyst
|
|
|
Day 7=
|
Implatation begins
|
|
|
Implantatoin of the Blastocyst:
|
1) Trophoblast forms placenta
2) ICM forms germinal disc |
|
|
Extracelluar membranes:
|
Amnion
Chorion Yolk Sac |
|
|
Embryonic Period:
|
complex period of development is when the embryonic cells (epiblast) differentiate into 3 primary germ layers:
1) Ecdoderm 2) Endoderm 3) Mesoderm |
|
|
Ectoderm Develops:
|
skin tissue (hair, nails, sweat glands, mammary glands)
-nervous tissues & sense organs -pituitary glands -adrenal of teeth -lens of eye -enamel of teeth |
|
|
Endoderm Develops:
|
epithelial lining of respritory tract, and GI tract
-liver (most of) -gallbladder -pancreas -thymus -thyroid gland |
|
|
Mesoderm Develops:
|
stuff between the outside and inside
muscle tissue, heart, internal organs, lining of blood vessels, lymph vessels, connective tissues, including bone, cartilage, and blood |
|
|
How long does the fetal period last?
|
9-38 weeks
|
