Skeletal System

Skeletal System

The framework of the body consisting of bones, joints, cartilage, and ligaments.

206

The number of bones in the adult human body.

Ossification

The process of bone formation.

Haversian system

The structural unit of compact bone.

Osteoblasts

Cells that build bone by secreting the matrix.

Osteoclasts

Cells that break down bone for remodeling and calcium release.

Epiphyseal disc

Also known as the growth plate, where longitudinal growth occurs.

Osteoporosis

A condition common in postmenopausal women characterized by decreased bone density.

Foramen

A hole for blood vessels or nerves.

Fossa

A shallow depression in a bone.

Tuberosity

A large rounded projection on a bone.

Bone remodeling

The lifelong process where old bone is replaced by new bone.

Calcium and Phosphorus

Minerals stored in the skeletal system.

Hematopoiesis

The process of producing blood cells, occurring in red marrow.

Growth Hormone (GH)

Hormone that stimulates bone growth.

Weight-bearing activities

Exercises that stimulate bone growth and preserve bone mass.

Projections

Bone surface markings for muscle/tendon/ligament attachment.

Depressions and grooves

Bone surface markings that serve as paths for nerves and blood vessels.

Clinical Pearl

A practical point about bone care, emphasizing lifelong bone remodeling.