I am not 100% sure but I think it’s A sorry if I am wrong but a answer is batter then no answer lol have a good day
The cell would dissolve in water
The right answer is vein (it contains blood and has valves).
The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.
Where they have there effect on the tissues cells
