Biology 30 - Fertilization & Pregnancy Flashcards
1
Q
Cleavage
A
- Rapid mitotic divisions
2
Q
What is the cell referred to when it is at 16 cells?
A
- Morula
3
Q
What is the morula referred to 6 days after fertilization?
A
- Blastocyst
4
Q
What is the outer layer of the blastocyst called?
A
- Chorion
5
Q
What will the inner cell mass of the blastocyst become?
A
- The embryo
6
Q
What are the four extra embryonic membranes?
A
- Chorion
- Allantois
- Amnion
- Yolk sac
7
Q
Chorion
A
- Forms the fetal portion of the placenta
- Secretes HCG
8
Q
Allantois
A
- Provides blood vessels in the placenta
- Foundation of the umbilical cord
9
Q
Amnion
A
- Forms the amniotic sac
- Protects the developing embryo/fetus
10
Q
Yolk sac
A
- Site of early red blood cell formation and lining of the digestive tract
11
Q
Morphogenesis
A
- Series of events that form the distinct structures of the developing fetus.
12
Q
Gastrulation
A
- Formation of three primary germ layers
13
Q
What are the three germ layers in gastrulation?
A
- Ectoderm
- Mesoderm
- Endoderm
14
Q
Chorionic villi
A
- Finger-like projections that will extend as part of the umbilical cord into the endometrial lining of the uterus.
15
Q
Teratogens
A
- Any agents that will cause a structural abnormality due to exposure during pregnancy.
16
Q
Colostrum
A
- Released before lactation milk
- Does not have fats and sugars so baby will not gain weight
- Strengthens baby’s immune system
17
Q
Gestation
A
- Process of pregnancy, where a fertilized egg grows into a baby inside the mother’s womb.
- Usually lasts around 40 weeks in humans, starting from conception and ending with birth.
- During this time, the baby develops and matures.
