Answer:
closed circulatory system has the blood closed at all times within vessels of different size and walk thickness. blood is pumped by a heart through vessels and does not normally fill body cavities
Answer:
The family is the basic unit of social health because if relationships with family members are good, a child learns to love, respect, get along with others, and to function as part of a group.
Answer:
from the semens
Explanation:
because that's where they are ejaculated.
Because it prepares your muscles for an intense workout