Mammalian pinna is supported by[MP PMT 1995]a)Hyaline cartilageb)Calcified cartilagec)Elastic cartilaged)White fibrous connective tissue.Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Pinna is composed of a thin plate of yellow elastic cartilage, which is covered with integument and connected to the surrounding parts by ligaments and muscles. Hence, option C is correct answer.

Answer

Pinna is composed of a thin plate of yellow elastic cartilage , which is covered with integument and connected to the surrounding parts of ligaments and muscles .
so, the option C is the correct.

Answer

The correct answer for the question is option 'C' - Elastic cartilage. The mammalian pinna, also known as the external ear or auricle, is the visible part of the ear that is responsible for collecting and funneling sound waves into the ear canal. It is made up of a flexible and elastic structure called elastic cartilage, which provides support and shape to the pinna.

Elastic cartilage is a type of cartilage that is characterized by the presence of elastic fibers in its extracellular matrix. These elastic fibers give the cartilage its flexibility and elasticity, allowing it to be easily bent and shaped without breaking. Elastic cartilage is found in various parts of the body, including the pinna of mammals, the epiglottis, and the external auditory canal.

The structure of the pinna is composed of a thin layer of skin on the outer surface, which covers the elastic cartilage. The elastic cartilage provides the pinna with its characteristic shape and rigidity, allowing it to maintain its form and position on the side of the head. Additionally, the elastic properties of the cartilage help in the absorption and diffusion of sound waves, enhancing the ability of the pinna to collect and direct sound into the ear canal.

The use of other types of cartilage, such as hyaline cartilage or calcified cartilage, would not be suitable for supporting the pinna. Hyaline cartilage is a more rigid type of cartilage that is found in areas such as the trachea and the articular surfaces of joints. Calcified cartilage, on the other hand, is a type of cartilage that has been mineralized with calcium deposits, making it hard and less flexible.

White fibrous connective tissue, another option given in the question, is not the primary component of the pinna. While it may be present in small amounts in the pinna, it is not responsible for providing the main structural support or elasticity. White fibrous connective tissue is found in structures such as tendons and ligaments, where it provides strength and stability.

In conclusion, the mammalian pinna is supported by elastic cartilage. The elastic properties of this cartilage allow the pinna to maintain its shape and position, while also assisting in the collection and direction of sound waves into the ear canal.

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