STRUCTURES ASSOCIATED WITH A SKELETAL MUSCLE

Introductory Questions

Where is skeletal muscle found in your body?

Attached to bone.

(Smooth muscle lines organs, and cardiac muscle is found in the heart.)

What is the function of skeletal muscle?

Voluntary movement

Stability (posture)

Communication (facial expression, speech)

Control of body openings

Heat production- 85% of body heat is generated by muscles providing the proper environment for enzymes and therefore metabolism

Word Parts/Meanings

Fascia- band or bundle

Epi-upon

Peri- around

Endo- inner

Mys- muscle

Sarco-flesh

Lemma- husk

Structures of a skeletal muscle fiber

A Sarcomere

Twizzler analogy

Many packages of Twizzlers = Fascicle

Find a Fascicle on your diagram.

Twizzler analogy 2

1 package of

Twizzlers =

Muscle fiber

The packaging =

Sarcolemma

Twizzler analogy 3

1 bundle of twizzlers =

myofibril

Twizzler analogy 4

1 Twizzler strand =

Filament

Compare the Muscle Fiber to Pull and Peel Twizzlers

How amazing is that?