that a further extremely important function must be attributed to this organ; in their opinion it acts as a storehouse for the red cells of the blood, a number of which may be kept there ready to ...

Blood travels around the body in tubes called arteries, veins or capillaries Arteries carry blood away from the heart towards an organ Veins carry blood from an organ towards the heart.

A popular hypothesis for how the brain clears molecular waste, which may help explain why sleep feels refreshing, is a ...

Healthy kidneys are essential for a healthy life as the organ is responsible for filtering the blood of waste products ... forming in the lining of small tubes inside the kidneys.