Question

hi what is valves and capillaries...​

Answer 1

Answer:

Capillaries:-

The capillaries connect the two types of blood vessel and molecules are exchanged between the blood and the cells across their walls.

Valves:-

Veins contain valves which prevent the backflow of blood.

Answer 2

Step-by-step explanation:

Valve, in anatomy, any of various membranous structures, especially in the heart, veins, and lymph ducts, that function to close temporarily a passage or orifice, permitting movement of a fluid in one direction only. A valve may consist of a sphincter muscle or two or three membranous flaps or folds.

Capillaries are the smallest of the body's blood vessels. They are only one cell thick, and they are the sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body; they also collect carbon dioxide waste materials

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