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The adult human brain weighs...about 3 pounds (1,300-1,400 g). The adult human brain is about 2% of the total body weight. The average human brain is 140 mm wide. The average human...brain is 167 mm long.
Bones of the skeleton can be grouped into the following major...types: long, short, flat, and irregular. Each type has a somewhat different construction pattern.
1....Long Bones: The basic structure of a long bone is illustrated in figure 4-1. Example: femur.
2....Short Bones: The short bones, such as those of the wrist and feet, have a thin layer of compact bone surrounding an inner mass of spongy...bone. Example: carpal bones.
3. Flat Bones: The flat bones are constructed with two plates of...compact bone, which enclose between them a layer of spongy bone. The spongy bone is richly supplied with blood vessels and red marrow. Example: the...cranial frontal bone.
4. Irregular Bones: The irregular bones are those that do not fit into the...three categories above. Example: a vertebra.