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प्रश्न
Answer the following question.
What enables the ear pinna to be folded and twisted while the nose tip can’t be twisted?
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उत्तर
- The ear pinna (outer ear) is made up of a thin plate of elastic cartilage and is connected to the surrounding parts by ligaments and muscles. This elastic cartilage gives support and maintains the shape of pinna.
- The nose tip is made up of elastic cartilage. However, several bones and cartilage make up the bony cartilaginous framework of the nose.
Hence, even though the tip of the nose is made up of elastic cartilage, it cannot be twisted like the ear pinna due to the presence of a bony-cartilaginous framework.
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संबंधित प्रश्न
Write true or false of the statement. Rewrite the false statement correctly.
Cardiac muscles are involuntary muscles.
Distinguish between the following pair in one or two sentences for striated and unstriated muscles.
Classify and explain different types of muscles with the help of suitable diagrams.
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Striated muscles are also called involuntary muscles.
Give structure, types and functions in brief of the following:
Muscular tissue
Differentiate between voluntary and involuntary muscles. Give one example of each type.
Cork cells possesses ______ on their walls that makes it impervious to gases and water.
Non-striated muscles are found in ______.
Assertion: Non-striated muscles are said to be voluntary in nature.
Reason: Non-striated muscles are under the control of our will.
A muscle fibre tapers at both ends and does not show striations. Name the muscle fibre.
