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The cancellous bone forms via two ossification centres, one medial and one lateral, which fuse later on. The compact forms as the layer of fascia covering the bone stimulate the ossification of adjacent tissue. The resulting compact bone is known as a periosteal collar. The collarbone has a medullary cavity (marrow cavity) in its medial two ...
The 'giraffe-like' stretched necks (sometimes also other organs) of women among the Burmese Kayan tribe, the result of wearing brass coils around them. This compresses the collarbone and upper ribs but is not medically dangerous. It is a myth that removing the rings will cause the neck to 'flop'; Padaung women remove them regularly for cleaning ...
A clavicle fracture, also known as a broken collarbone, is a bone fracture of the clavicle. [1] Symptoms typically include pain at the site of the break and a decreased ability to move the affected arm. [ 1 ]
It is composed of 270 bones at the time of birth, [2] but later decreases to 206: 80 bones in the axial skeleton and 126 bones in the appendicular skeleton. 172 of 206 bones are part of a pair and the remaining 34 are unpaired. [3] Many small accessory bones, such as sesamoid bones, are not included in this.
The canal of the nutrient foramen is directed away from more active end of bone when one end grows more than the other. When bone grows at same rate at both ends, the nutrient artery is perpendicular to the bone. Most other bones (e.g. vertebrae) also have primary ossification centers, and bone is laid down in a similar manner. Secondary centers
"Woodford County High School and the principal have been enforcing a dress code whereas girls cannot show even their collarbones because it may distract their male classmates.
The axial skeleton (80 bones) is formed by the vertebral column (32–34 bones; the number of the vertebrae differs from human to human as the lower 2 parts, sacral and coccygeal bone may vary in length), a part of the rib cage (12 pairs of ribs and the sternum), and the skull (22 bones and 7 associated bones).
The long bone category includes the femora, tibiae, and fibulae of the legs; the humeri, radii, and ulnae of the arms; metacarpals and metatarsals of the hands and feet, the phalanges of the fingers and toes, and the clavicles or collar bones. The long bones of the human leg comprise nearly half of adult height.