Placenta
Placenta is made of _______ which is in contact with the _____ wall.
Fetal tissue, uterine
The functional unit is a ______-like piece of fetal tissue called a _______.
Finger, placental villus
As the fetus grows, more ______ forms. What does this give?
Villi, gives more surface area
What contains blood vessels that allows for exchange of materials between the fetus and maternal blood? Where does the blood flow?
Villi, blood flows in spaces around the villi called intervillous spaces
The placental barrier is non-permeable or selectively permeable?
Selectively permeable