types of bones

Question 1

compact vs spongy

Answer 1

The adult skeleton is composed of 206 bones. There are two basic types of osseous, or bone, tissue: Compact bone is dense and looks smooth and homogeneous, whereas spongy bone has a spiky, open appearance like a sponge (Figure 5.1).

Question 2

bones come in diffrent lengths what are the diffrent types all togheter

Answer 2

Additionally, bones come in many sizes and shapes. For example, the tiny pisiform bone of the wrist is the size and shape of a pea, whereas the femur, or thigh bone, is nearly 2 feet long and has a large, ball-shaped head. The unique shape of each bone fulfills a particular need. Bones are classified according to shape into four groups: long, short, flat, and irregular (Figure 5.2).

Question 3

long bones

Answer 3

As their name suggests, long bones are typically longer than they are wide. As a rule, they have a shaft with enlarged ends. Long bones are mostly compact bone but also contain spongy bone at the ends. All the bones of the limbs, except the patella (kneecap) and the wrist and ankle bones, are long bones.
Flat bones are th

Question 4

Flat bones

Answer 4

are thin, flattened, and usually curved. They have two thin layers of compact bone sandwiching a layer of spongy bone between them (see Figure 5.1). Most bones of the skull, the ribs, and the sternum (breastbone) are flat bones.

Question 5

short bone

Answer 5

Short bones are generally cube-shaped and contain mostly spongy bone with an outer layer of compact bone. The bones of the wrist and ankle are short bones. Sesamoid (ses’ah-moyd) bones, which form within tendons, are a special type of short bone. The best-known example is the patella

Question 6

irregular bone

Answer 6

Bones that do not fit one of the preceding categories are called irregular bones. The vertebrae, which make up the spinal column, fall into this group. Like short bones, they are mainly spongy bone with an outer layer of compact bone.