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 the left ventricle and the aorta

Pulmonary valve controls blood flow between the right ventricle and the pulmonary arteries.

HP

Related Human Biology A Level answers

All answers ▸

Approximately how long is a double-stranded DNA molecule with a molecular weight of 3x10^9 g/mol? Assume the molecular weight of one nucleotide is 333 g/mol, and that there are 10 base pairs for each turn of the DNA helix equalling 3.4nm in length.


What is X-linked recessive inheritance?


Describe the structure of the human heart and how the blood is pumped by the heart.


State three differences between the structure of DNA and the structure of RNA