Answer:
They are different layers that protect us...skin protects your muscles, and your muscles protect your cells
Explanation:
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Tracheal cartilage .
Explanation:
Trachea is also known as wind pipe. It acts as passage for air that enters through nasal cavity and migrates to the lungs. The trachea is made up of tracheal rings. This provides flexibility to the wind pipe. The trachea divides into two bronchi that enters the left and right lungs.It has a covering called epiglottis that prevents entry of food while swallowing.
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Your question is related to <u>pathology</u>.
When antigens are administered to produce immunity, different routes of administration are considered because each route stimulates a different lymphocyte-containing tissue, resulting in diff. types of cellular and humoral immunity (D.)
