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Question
Gayathri had learned about immune system in class. She wondered if any part of the immune system is visible to our eyes. When she asked a doctor, he told her that some components of the first barrier of defence are visible to our eye. Help her identify these components.
Gayathri had learned about immune system in class. She wondered if any part of the immune system is visible to our eyes. When she asked a doctor, he told her that some components of the first barrier of defence are visible to our eye. Help her identify these components.
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Solution
The correct options are
A Skin
B Mucus
D Ear wax
Our first level of defence consists of components such as skin, mucus and ear wax. A protein called keratin makes the skin a thick fort which prevents germs from entering it. Mucus in the trachea prevents the entry of germs into the lungs. The wax in the ear prevents pathogens. Hydrochloric acid in the stomach also fights against germs but since this is inside the body, it is not visible to the eye.
A Skin
B Mucus
D Ear wax
Our first level of defence consists of components such as skin, mucus and ear wax. A protein called keratin makes the skin a thick fort which prevents germs from entering it. Mucus in the trachea prevents the entry of germs into the lungs. The wax in the ear prevents pathogens. Hydrochloric acid in the stomach also fights against germs but since this is inside the body, it is not visible to the eye.
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