In a normal biventricular circulation the right atrium has four main functions: it acts as a pump, a reservoir, an initiator and propagator of sinus impulse, and it has a neurohumoral role of ...

Plasma is a straw-coloured liquid that makes up just over half the volume of blood. You have about 5.5 litres of blood in your body That’s is the same amount of liquid as there is in these cola ...

One of the most important preconditions for the development of terrestrial vertebrates in the course of evolution was the formation of the two halves of the circulatory system. Aquatic ancestors ...

Biologists often show oxygenated blood as red, and deoxygenated blood as blue. This is just a way of illustrating it in biological diagrams. It's also helpful in showing the different regions of the ...