The nature of valves in the heart is:
Correct answer: A. Membranous
- A. Membranous
- B. Muscular
- C. Ligamentous
- D. All of these
Explanation
The nature of valves in the heart is membranous. They are composed of sheets of tough membrane like connective tissue (leaflets) that act as flaps. The heart has four valves:Mitral valve (bicuspid valve) - Located between the left atrium and left ventricle. It has two leaflets.Tricuspid valve - Located between the right atrium and right ventricle. It has three leaflets.Pulmonary valve - Located between the right ventricle and the pulmonary artery. It has three leaflets.Aortic valve - Located between the left ventricle and the aorta. It has three leaflets.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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