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Human Biology
A Level

What is the blood supply of the liver?

The liver is unique in that it has a dual blood supply, both the portal venous system and the systemic circulation. 75% of the blood that flows through the liver is from the portal venous system, venous ...

Answered by Alistair G. Human Biology tutor
2752 Views

Name the lobes of the cerebrum and describe their function briefly. Also describe the function of the cerebellum and the brainstem.

There are 8 lobes in the cerebrum, 4 in each hemisphere. The frontal lobes are involved in conscious thought, planning, emotions, and problem solving. The parietal lobes are responsible for processing of ...

Answered by Abigail G. Human Biology tutor
2588 Views

Explain the Cardiac Cycle

Deoxygenate blood from the body drains into the right atrium of the heart through the superior and inferior vena cave vessels. When the atria contract, blood is squeezed through the tricuspid valve into t...

Answered by Simi P. Human Biology tutor
2657 Views

What are the 4 main valves in the heart, and where are each of them located?

Mitral valve and tricuspid valves control blood flow from the atria to the ventricles. Mitral on the right side, and tricuspid on the left side of the heart

Aortic valve controls blood flow between...

Answered by Harriet P. Human Biology tutor
2693 Views

Discuss the causes and associated health problems of atherosclerosis

Causes- Too much cholesterol in the blood. This can be as a result of high LDL and low HDL levels in the blood. or as it is more known as a high LDL:HDL ratio. 

LDL are not very good for you and a ...

Answered by Loubna K. Human Biology tutor
2702 Views

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