The circulatory system is system in the human body that provides a network through which our blood flows constantly.The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system. Correct answer: D
In the closed circulatory system the blood stays confined within the vessels and heart.
A i think hhzjjzjzjzjzjzjzjz
Answer:
1. cell
2. tissue
3. organism level/ organism.
Explanation:
have a nice day UwU! (im not a furry)
B. It is important for muscle coordination and balance.
