Muscular System

1. Structures

1.1. Myosin

2. theory of muscle contraction

2.1. Actin and myosin form crossbridges and use ATP to perform powerstrokes and shorten the sarcomere

2.2. Sarcomere

2.2.1. Contractile unit of a muscle. They lie end to end in Myofibrils.

2.2.1.1. Myofibrils are composed of two myofilaments

3. Actin

4. Sliding filment

5. Muscle Types

5.1. Skeletal

5.1.1. Attach to bones

5.2. Heart muscle

5.3. Cardiac

5.4. Smooth

5.4.1. Inside organs and blood vessels. Cause dilation and constriction

6. endomysium

7. Functions

7.1. movement

7.2. control passages

7.3. heat production

7.4. communication

7.5. stability

8. Structures

8.1. 1 muscle

8.1.1. Perimysium

8.1.1.1. Fascicle

8.1.2. epimysium

8.1.2.1. fascia grades into

8.2. bundles of fibres

8.3. 1 fibre

8.4. myofibril

8.5. myofilaments

8.5.1. myosin

8.5.2. actin