Answer:
Gas exchange between tissues and the blood is an essential function of the circulatory. The air contains oxygen that crosses the lung tissue, enters the bloodstream, and the alveoli are in direct contact with capillaries of the circulatory system. As water flows over the gills, oxygen is transferred to blood via the veins.
Explanation:
Answer:
C. Responsiveness and timing
Explanation:
I just know it, I really don't know how to explain
Answer:
They all have same basuc cepl structure , which consists of cytoplasm , nucleus , !nd outer membrane
