microscopic A&P of skeletal muscles exercise 12

Muscles and make up

Skeletal muscle

What muscle am I?

1\.Nuclei

2\.striations

3\.Muscle fiber

Skeletal muscle

Cardiac muscle

What muscle am I ?

1\. Intercalated discs

2\. striations

3\.Glycogen

Cardiac Muscle

Smooth muscle

what muscle am I ?

Smooth Muscle

1. Nuclei
2. Muscle cells

Skeletal Muscle

1\.Nucleus

2\.Muscle fiber

3\.Endomysium

4\.Striation

Cardiac Muscle cell

1\.Desmosomes

2\.Gap Junctions

3\.Endomysium

4\.Intercalated discs

5\. Mitochondrion

6\.Sarcolemma

7\.Nucleus

8\.Cardiac muscle cell

Cardiac Muscle

1\.Branched cardiac cell

2\.Intercalated disc

3\.Nuclei of cardiac cell

Smooth Muscle

1\.Longitudinal smooth muscle fiber

2\.Smooth muscle cell

3\.Transverse smooth muscle fiber

Smooth Muscle

1\.Smooth muscle fiber

2\.Central nuclei of smooth muscle fibers

1\.Tendon

2\.Fascia

3\.Skeletal muscle

4\.Muscle fascicle

5\.Nerve

6\.Blood vessels

7\.Epimysium

8\.Endomysium

9\.Muscle fiber

10\.Muscle Fascicle

11\.Perimysium

12\.Muscle fiber

1\.Tendon

2\.Fascia

3\.Skeletal muscle

4\.Muscle fascicle

5\.Nerve

6\.Blood vessels

7\.Epimysium

8\.Endomysium

9\.Muscle fiber

10\.Muscle Fascicle

11\.Perimysium

12\.Muscle fiber1

What is the highlighted area? What does it do?

Tendon-attach muscle to bone thus movement

What is the highlighted area?

Epimysium

What is the highlighted area?

Perimysium

What is the Cylinder structure?

Fascicle

What is the web? What is the structure protruding out and what surrounds it?

1. Endomysium
2. Individual muscle fiber surrounded by Sarcolemma with nuclei beneath

Connective tissue & Fascicles in order

Epimysium>Perimysium>Fascicle>Endomysium>Sarcolemma

Skeletal Muscle Fiber

1\.Muscle

2\.Fascicle

3\.Muscle fiber

4\.Nucleus

5\.Opening to T-tubules

6\.Mitochondrion

7\.Sarcoplasm

8\.Myofilaments

9\.Sarcomere

10\.Myofibrils

11\.Sarcolemma

12\.Terminal Cisternae

13\.T-tubule

14\.Triad

15\.Sarcastic Sarcastic reticulum

Myofilaments (thick & thin)

1. Myosin molecule
2. Myosin Head
3. Tropomyosin (green)
4. G-actin (red single)
5. F- actin (red multiple)
6. Troponin (blue)

Sarcomere

1. Z disc
2. Thin filament
3. myosin
4. M line
5. Thick filament
6. Actin
7. Tropomyosin
8. Troponin
9. Z disc
10. H zone

Components of Sarcomere

1. Sarcomere
2. Z disc
3. Z disc
4. Thick filament
5. Thin filament
6. m line
7. Thin filament
8. H zone

parts of the neuromuscular junction

1. skeletal muscle fiber
2. Axon of motor nerve
3. Motor end plate

name the highlighted muscle, two origins, and the single intersection.

1. Sternocleidomastoid
2. Insertion: mastoid process of temporal bone
3. Origin: Sternum and clavicle

Muscle cell

1. Triad (leaf)
2. Terminal Cisterns ( both sides if middle line)
3. T-tubule (middle line)
4. Mitochondrion
5. Sarcoplasmic reticulum (web)
6. Myofibril (thick)

neuromuscular junction

1. motor nerve fibers
2. neuromuscular junction
3. muscular fibers