ECOLOGY
EXCRETORY PRODUCTS AND THEIR ELIMINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Release of insulin from the pancreas
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Release of saliva from salivary glands
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Removal of carbon dioxide from the lungs
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Removal of faeces from the alimentary canal
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Detailed explanation-1: -Exhalation of carbon dioxide from the body is an example of excretion.
Detailed explanation-2: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.
Detailed explanation-3: -These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.
Detailed explanation-4: -Carbon dioxide, urea and water are excreted from the body in one way or the other. Removal of undigested food through the anus is not excretion. This process is called defecation.