EVERYDAY SCIENCE

Detailed explanation-1: -Spine – cervical, thoracic and lumbar vertebrae, sacrum and tailbone (coccyx) Chest – ribs and breastbone (sternum) Arms – shoulder blade (scapula), collar bone (clavicle), humerus, radius and ulna. Hands – wrist bones (carpals), metacarpals and phalanges. Pelvis – hip bones.

Detailed explanation-2: -The adult human skeleton usually consists of 206 named bones. These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum.

Detailed explanation-3: -The appendicular and axial skeleton are two different divisions of the human skeleton. The axial skeleton comprises the spinal column, rib cage, skull, and other supporting bones. The shoulder girdle, pelvic girdle, and upper and lower limb bones form the appendicular skeleton, connected to the axial skeleton.

Detailed explanation-4: -The bones of the human skeleton are classified by their shape: long bones, short bones, flat bones, sutural bones, sesamoid bones, and irregular bones (Figure 1).

Detailed explanation-5: -There are typically around 270 bones in human infants, which fuse to become 206 to 213 bones in the human adult. The reason for the variability in the number of bones is because some humans may have a varying number of ribs, vertebrae, and digits.