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Q: Bones have a hard non–pliable ground substance rich in calcium salts and .......... fibres which give bone its strength.
  • A. Cartilage
  • B. Fibroplast
  • C. Macrophage
  • D. Collagen
Correct Answer: Option D - Bones have a hard non–pliable ground substance rich in calcium salts and Collagen fibres which give bone its strength. Collagen is the most abundant material in body, about 1/3rd of its protein composition. It's one of the major building blocks of bones, skin, muscles, tendons and ligaments. Also found on other body parts, including - Blood vessels, corneas and teeth.
D. Bones have a hard non–pliable ground substance rich in calcium salts and Collagen fibres which give bone its strength. Collagen is the most abundant material in body, about 1/3rd of its protein composition. It's one of the major building blocks of bones, skin, muscles, tendons and ligaments. Also found on other body parts, including - Blood vessels, corneas and teeth.

Explanations:

Bones have a hard non–pliable ground substance rich in calcium salts and Collagen fibres which give bone its strength. Collagen is the most abundant material in body, about 1/3rd of its protein composition. It's one of the major building blocks of bones, skin, muscles, tendons and ligaments. Also found on other body parts, including - Blood vessels, corneas and teeth.