Name _______________________________________ Date _________________ Period ___________

Skeletal and Muscular Systems Notes

Skeletal SystemFunction:

Components:

Bone Structure:Bones are a solid network of living cells and protein fibers that are surrounded by deposits of calcium salts.

- Periosteum:

- Haversian canals:

- Spongy bone:

- Bone marrow:

Bone Development:- Cartilage: - Ossification:

Bone Repair and Remodeling:

- Osteoblasts:- Osteoclasts:- Osteoprosis:

Joints:

Ligaments:

Injury: torn ACL:

Flexibility:

Muscular SystemFunction:

Components:

Skeletal Muscle:

Smooth Muscle:

Cardiac Muscle:

Muscle Contractions: Skeletal muscle cells contain myosin and actin filaments. These overlapping filaments work together to contract a muscle.

1. Motor neuron is stimulated and releases a neurotransmitter (acetylcholine, ACh)

2.

3. Muscle cell contracts (see picture to the right) until

Bone and Muscle Interactions

Tendons: