Introduction to the Muscular System

Introduction to the

Muscular System​

There are roughly 630 skeletal muscles in the body.

Multiple Choice

What are two functions of the muscular system?

• Hormone Production, Sensation

• Movement and Heat Production

• Defense against disease, fluid transport

• Heat Production

  Cleaning blood

​Functions of the Muscular System

1. Movement

2. ​Heat Production

Add these to your notes

Open Ended

What are the other three functions of the muscular system that were defined in the white anatomy textbook? (check your primer and type one)

And now an unfinished song.

a prechorus, chorus and part of a bridge

​- Mr. Helle

" In between the bones with tendons at both ends is an overworked and underrated contractile tissue friend" 

" My muscles move and groove me, guard entrances and exits, produce the heat that keeps me warm." 

" My muscles support soft tissues, maintain my body's posture, help me run to shelter in the time of storm."

" Muscles I am grateful for you! Yeah yeah yeah, when you don't know what to sing you sing yeah yeah yeah."

​Muscle is considered to be contractile tissue because it works by getting shorter.

(like a ratchet strap that ratchets super fast.)

Muscles can only pull, they can't push.

If you are pushing something, it is because muscles are pulling and getting shorter.

​The three most important things about a muscle.

​Origin - attachment of a muscle to a stationary

(non-moving) bone.

Insertion - attachment of a muscle to a moving bone.

Action​ - motion carried out by a muscle.

Where the ratchet straps attach and what bone moves when the muscle gets shorter.

Match

Actions of Muscle...lets see what we can figure out before we learn them officially (add to your notes when the question is over)

• Flexion

• Extension

• Rotation

• Abduction

• Adduction

Decrease the angle between bones

Increase the angle between bones

Spinning a bone on an axis.

Taking a bone away from the midline

Moving a bone toward the midline

• Decrease the angle between bones

• Increase the angle between bones

• Spinning a bone on an axis.

• Taking a bone away from the midline

• Moving a bone toward the midline

Flexion - Decrease the angle between bones

Extension - Increase the angle between bones

Rotation - Spinning on an axis (not all the way)

Abduction - Move away from the midline

Adduction - Move toward the midline​

​More actions to add to your notes:

You should have nine total after these.

Elevation - Raise Superior

Depression - Lower inferior

Plantar Flexion - Pointing toe (like a calf raise)

Dorsiflexion - Bring foot backwards.​

​More actions to add to your notes: