what structures have valves outside the heart and why?

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what structures have valves outside the heart and why?

a simple answer?
thankyou.

2007-10-16 14:19:54 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology

3 answers

Veins in the legs, to prevent blood being pulled back down by gravity.

2007-10-16 14:45:00 · answer #1 · answered by Howard H 7 · 0⤊ 0⤋

Do you mean other types of valves in the body apart from heart valves?

If so there is the portal valves that regulates the amount of venous blood entering the kidney. The pyloric valve is a fold of mucous membrane at the pyloric orifice of the stomach,

2007-10-16 21:46:46 · answer #2 · answered by Roisin F 2 · 0⤊ 0⤋

the stomach has a one-way valve. this prevents you from regurgitating your food.

2007-10-16 22:31:58 · answer #3 · answered by poopee_dogg 1 · 0⤊ 0⤋