Question

Answer the questions....​

Answer 1

1) Excretion involves the separation and elimination of metabolic waste products from the body. Various organs are involved in this process: the lungs, gills, skin, etc. The kidneys and their ducts are the major full-time excretory organs and comprise the excretory system.

2) Humans have a four-chambered heart consisting of the right atrium, left atrium, right ventricle, and left ventricle. The atria are the two upper chambers. ... The atria are depolarised by calcium. High in the upper part of the left atrium is a muscular ear-shaped pouch – the left atrial appendage.

3)Ambrisentan is used to treat high blood pressure in people who have pulmonary arterial hypertension. The usual dose is one 5 mg tablet daily. You can take ambrisentan either with or without food. The most common side-effects are headache, and swollen feet and ankles.

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