Answer : Heart is an important muscular organ of the body. It is a vital organ because it controls the blood circulatory system in the human body. It pumps blood mixed with oxygen to different parts of the body.
There are many nerves attached to the heart. It is situated in the middle compartment of the chest and is placed between the lungs. If any parts which is associated with the heart gets injured or damaged. The function of the heart will get disturbed which may even cause death of that human.
Any nerve, or tissue, or veins, or capillaries, or valves of heart which is not performing its function properly may prove to be fatal for that individual. It can give a heart stroke, or a cardiac arrest also.
The answer is D! Hope I helped!
Edward Jenner, FRS was an English physician and scientist who was the pioneer of smallpox vaccine, the world's first vaccine. Jenner is often called "the father of immunology", and his work is said to have "saved more lives than the work of any other human". so the answer is Edward Jenner invented a vaccination from cow pox that could make a person immune to smallpox.
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The endocrine, nervous, and muscular systems work together and maintain temperature homeostasis. Insulin, a hormone released from the pancreas, works with the digestive system and maintains energy homeostasis.
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The average estimates were that 21% of men are gay and 22% of women are lesbians.
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