chapter 15 fetus and placenta Flashcards
1
Q
thymus
A
- an organ of the endocrine and lymphatic systems
- secretes hormones; involved in immunity
2
Q
placenta
A
- composed of both maternal and fetal tissues
- exchange of substances between maternal and fetal blood occurs here
3
Q
umbilical cord
A
- contains umbilical vessels
- extends between the placenta and the umbilicus of the fetus
4
Q
umbilical artery
A
- paired
- blood flows from the fetus to the placenta
5
Q
umbilical vein
A
- single
- blood flows from the placenta to the fetus
