Human Reproduction Pregnacey Flashcards
(20 cards)
What is the yoke sack
The yolk sack provides the first red blood cells and latter becomes part of digestive tract
What dose the Chorionic ville do
Increases surfs area for exchange mom and baby nutrition and oxygen
What is the purpose of the Amniotic fluid
To insulate the embryo/fetus
What is the purpose of the amniotic sack
To contain the amniotic fluid
What is the purpose of the allantois
Provides blood vessel’s for placenta
What is the endoderm and what is it’s perpose
To develop into digestive system liver pancreas and lungs
What is the purpose of the mesoderm
To develop into circulatory system lungs skeletal system and muscle
What is the purpose of the ectoderm
To develop into hair nails skin and nervous system
What are 5 important functions of the placenta
To provide nutrition, waste management, oxygen supply, hormones, and immune support
What structures develop first in development
Nervous system, heart, limbs, ears/eyes, breathing, mouth stuff, eating tubes, genitalia
What happens to the cervix before birth
Thins
What happens to progesterone before birth
Progesterone decrease
What happens to Relaxin before birth
Increases
What happens to oxytocin before birth
Increases
What happens to progesterone before birth
Increases
What is the purpose of oxytocin in birth and how is it released
Stimulates uterine contractions
Increases estrogen uterus contracts -> placenta releases prostaglandins-> oxytocin stimulates contractions -> placenta release prostaglandins
What is prolactin
Cases milk production
What is oxytocin’s job in breastfeeding
To contract smooth muscles around mamory glands
What is teratogens and what do they do
Any external agents that can cause the development of abnormalities
What is cleavage
Stage of cell devotion that occurs soon after fertilization
