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Hinge Joints

Name any two ...

Question

Name any two parts of your body where the supporting skeleton is made of cartilage instead of bone.

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Solution

Cartilage is a supporting and connecting structure. It is a strong and flexible tissue found in many parts of the body.

The two parts of the body which are made up of cartilage instead of bone are:

Walls of trachea is supported by C-shaped cartilaginous rings.

Upper portion of external ear (pinna).

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Q. Biology homework:- (•)Bones are hard and inelastic whereas cartilage is a soft elastic and soft tissue (•) Bone cells are called Osteocytes, cartilage cells are called Chondrocytes (•) Bones are highly vascular whereas cartilage is less vascular (•) The growth in bones is bidirectional, while it is unidirectional in cartilage (•) One Osteocyte is present in the lacunae of bones whereas 1-4 Chondrocytes can be present in lacunae of cartilage (•) Haversian canal system is present in bone but absent in cartilage (•) Matrix of bones is made of ossein proteins while the matrix of cartilage is made of chondrin proteins (•) Bones are surrounded by a sheath called Periosteum whereas cartilage is surround by perichondrium (•) Bones protect the body from mechanical damage and provide a framework for the shape of body whereas cartilage acts as shock absorber b/w bones and reduces friction at joints

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Statement 2: Cartilages are found in the upper part of the human ear.

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