1. Muscular System

2. Types of Muscle Smooth – involuntary Cardiac – heart
digestive system and blood vessels
Cardiac – heart
Skeletal – voluntary
Over 600 muscles in human body
They work in pairs: one muscle moves the bone in one direction and the other moves it back again
Muscle make up over half of body weight

4. Function of Skeletal Muscle
Support
Allow bone movement
Protects internal organs and stabilizes joints
Help maintain body temp

5. Skeletal Muscle Every muscle is either a Flexor or an Extender.
Flexors- Muscles that flex or bend a joint.
Extenders- Muscles that extend or straighten joints.
Origin- Where the muscle is anchored to a bone to form a stationary attachment.
Insertion- The point at which the muscle is attached to a movable bone.
Belly – fleshy part of the muscle in between the tendons that does the actual contraction.

6. Names of Skeletal Muscle
Location –
tibialis anterior
Origin and Insertion –
sternocleidomastoid
Number of Origins –
bicep, tricep, quadricep
Shape, size and direction –
rectus abdominis, gluteus maximus/medius/minimus
Function –
adductors (pull leg together)

7. Muscles Connections 4 Bicep 5 Tricep 1 Legs (3) Quadriceps Hamstrings
Gastrocnemius
2 Back (2)
Trapezius
Latissimus Dorsi
3 Chest
Pectoralis
4 Bicep
5 Tricep
6 Shoulder
Deltoid
7 Abs (3)
Rectus Abdominis
Obliques
Transverse Abdominis
Connections
Ligaments – connect bone to bone
Tendons- connect muscle to bone