Skeletal System Structure, Classification, and Bone Growth (copy) (copy)

Support

Serves as the structural framework for the body, providing rigidity and maintaining shape.

Protection

Shields internal organs and tissues from physical impact and trauma.

Movement

Bones act as mechanical levers for muscles to produce motion.

Mineral Storage

Bones store minerals, primarily calcium, and release them into the bloodstream as needed.

Hematopoiesis

The production of blood cells, occurring within the marrow cavities of specific bones.

Long Bones

Characterized by being longer than they are wide; examples include femur and humerus.

Short Bones

Shaped like a cube with similar dimensions; found in carpals and tarsals.

Flat Bones

Can be straight or curved; provide protection and attachment for skeletal muscles (e.g., skull, ribs).

Irregular Bones

Have complex shapes; dedicated to structural integrity and protection (e.g., vertebrae).

Sesamoid Bones

Roundish bones embedded within tendons; protect tendons from wear (e.g., patella).

Longitudinal Growth

Increase in the length of bones, regulated by Human Growth Hormone (HGH).

Appositional Growth

Increase in diameter of bones, dependent on nutritional intake.

Calcitonin and Parathyroid Hormone (PTH)

Hormones that regulate calcium release between bones and the bloodstream.