MICROANATOMY

Detailed explanation-1: -The bones of athletes are typically stronger and heavier than nonathletes due to the stress applied to the bones by muscles.

Detailed explanation-2: -Even though bones stop growing in length in early adulthood, they can continue to increase in thickness or diameter throughout life in response to stress from increased muscle activity or to weight. The increase in diameter is called appositional growth.

Detailed explanation-3: -Compact bone (also known as cortical bone) forms the hard, dense outer layer of bones throughout the human body. Compact bone functions primarily to provide strength and protection to bones, and it is one of two types of bone tissue. The other type of bone tissue is known as spongy bone.

Detailed explanation-4: -Appositional growth is the increase in the diameter of bones by the addition of bony tissue at the surface of bones. Osteoblasts at the bone surface secrete bone matrix, and osteoclasts on the inner surface break down bone. The osteoblasts differentiate into osteocytes.