1. MUSCLE TISSUE PPT1
What are the parts of muscles?

2. Muscles are covered by skin

3. Each muscle is distinct and named

4. Muscle tendons attach to bone

13. REVIEW The next images are from your text.
Read your text and review these images.

14. EPImysium wraps whole muscle ENDOomysium PERImysium
Each part of the muscle is wrapped in a connective tissue wrapping (fascia) which protects the cells, and gives some stretch and strength
to the muscle
EPImysium
wraps whole muscle
Tendon
(b)
ENDOomysium
(wraps individual
muscle cells)
Fascicle:
A bundle of muscle cells
PERImysium
Wraps a bundle of
muscle cells
Muscle CELL
(somethimes
called a fiber)
Figure 9.1

15. Parts of a muscle cell

16. Each sarcomere is covered by sarcoplasmic reticulum (SR)(blue)
Width of one sarcomere
Part of a skeletal
muscle fiber (cell)
Z disc
Z disc
Myofibril
Sarcolemma
Triad: •
T tubule •
Terminal
cisternae
of the SR (2)
Sarcolemma
Tubules of
the SR
Myofibrils
Mitochondria
Each sarcomere is covered by sarcoplasmic reticulum (SR)(blue)
Each sarcomere has T tubules (white tube) running over the Z disc
Underneath the T tubules and SRs are the thin and thick filaments
Figure 9.5

17. MYOFIBRILS are broken into smaller units called SARCOMERES
SARCOMERES are made of smaller units called FILAMENTS (myofilaments)
Z disc
Z disc
(c)
Small part of one myofibril enlarged to show the myofilaments
responsible for the banding pattern. Each sarcomere extends from
one Z disc to the next.
Sarcomere
Z disc
Z disc
Thin (actin)
filament
Elastic (titin)
filaments
Thick
(myosin)
filament
(d)
Enlargement of one sarcomere (sectioned lengthwise). Notice the
myosin heads on the thick filaments.
Figure 9.2c, d