The vein valves prevent blood from sinking down and settling into the legs, mainly due to gravity. A varicose vein is where the valve is failing and blood settles and shows up as a swollen vein on the surface of the leg.
In the human circulatory system: Valves prevent the backwards flow of blood. In a brass instrument: Valves are pushed to change the length of the pipe, thus changing the pitch.
The function of the capillaries in the circulatory system is to allow diffusion of wastes, oxygen, and nutrients to the tissues. The rest of the circulatory system is designed to move the blood to the capillaries so they can perform this function.
it is to carry the blood around the body
The circulatory system of the chimp and human is basically the same.
read your science book and look at the diagram
They're the short-term, first reactors to a breach in the circulatory system.
tom dunsdons mum
circulatory system
The human body has 3 main parts:The heartThe bloodThe blood vesselsSometimes people count the fluid lymph, and the vessels that carry it in them, parts of the circulatory system.A few of the parts of the heart are ventricles, arteries, valves, the septum, and the atria. The pumping sound of the heart comes from valves opening and closing.
they permit exchange between the external atmosphere and the circulatory system.
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A human circulatory system.