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:
The DNA is not replicated by the way the cells are used to exist 
 
        
             
        
        
        
Answer:
many moons
Explanation:
None of Jupiter's moons have more than traces of atmosphere, so their skies are very nearly black. ... For an observer on Io, the closest large moon to the planet, Jupiter's apparent diameter would be about 20° (38 times the visible diameter of the Moon, covering 5% of Io's sky).
 
        
             
        
        
        
Answer:
Cell membrane provides protection for a cell. It gives assurance to a cell. It likewise gives a fixed climate inside the cell, and that film has a few distinct capacities.
Explanation: