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The muscular system_1_
1. Muscular System
Characteristics common to muscle tissue
Characteristics common to muscle tissue
Contractility: ability of the muscle to shorten.
Extensibility: ability of muscle to lengthen.
Elasticity: ability of muscle to return to
normal size.
Atrophy: is the wasting of muscle tissue
Hypertrophy: is the increase in size of muscle
tissue.
Controlled by nerve stimuli.
Fed by capillaries.
2. Muscular System
Different types muscle tissue
Different types muscle tissue
Smooth
Cardiac
Skeletal
Muscle types tutorial
3. Muscular System
Different types muscle tissue
Different types muscle tissue
Skeletal Muscles (striated or voluntary muscles)
are those which attach to bones and have the main function
of contracting to facilitate movement of our skeletons.
4. Muscular System
Different types muscle tissue
Different types muscle tissue
Smooth muscle (Unstriated) Involuntary muscle due
to our inability to control its movements.
Found in the walls of hollow organs such as the
stomach, esophagus, bronchi and in the walls of blood
vessels.
5. Muscular System
Different types muscle tissue
Different types muscle tissue
Cardiac muscle only in the
walls of the heart.
Similar to:
skeletal muscle -striated
smooth muscle- involuntarily
controlled
7. Muscular System
Structure of skeletal muscle
Structure of skeletal muscle
Epimysium:
This is the connective tissue wrap just under the
deep fascia that surrounds the entire muscle
Perimysium:
This connective tissue surrounds each individual
fascicle (bundle of muscle fibers).
Endomysium:
This is the connective tissue
wrapped around each
individual muscle cell (fiber).
Myofibrils: threadlike fibrils
that make up the contractile
part of a striated muscle fiber.
skeletal muscle structure
8. Muscular System
Structure of skeletal muscle
Structure of skeletal muscle
Structure of skeletal muscle
Muscle fibers are made up of a group of myofibrils.
Myofibrils contain myofilaments.
The myofibrils have distinct, repeating microanatomical
units, termed sarcomeres, which represent the basic
contractile units of the muscle fiber/cell (myocyte).
Myofilaments (actin & myosin)
are responsible for muscle
movement.
9. Muscular System
Structure of skeletal muscle
Structure of skeletal muscle
Myofilaments: (Thick and Thin)
Myosin: thick filaments
Actin: thin filaments
A unit of thick and thin filaments is
known as a Sarcomere.
These structures hold the key to
muscle contraction. The staggered thin
and thick filaments has the effect as
one might pull a rope towards oneself
hand over hand.
12. Muscular System
Origin and insertion of muscles
Origin and insertion of muscles
Origin: the point where the tendon
attaches to the bone which does not
move during muscle action.
Insertion: the point where the tendon
attaches to the bone which moves
during an action.
e.g. Action of biceps muscle: Scapula is
origin (Proximal point) and radius is the
insertion. (distal point)
Link for origin & insertion of muscles
http://www.getbodysmart.com/index.h
13. Muscular System
State the origin and insertion of the following
muscles:
(show picture
Anteriora muscles of each with your answer)
deltoid
pectoralis major & minor
iliopsoas
sartorius
quadriceps group
(rectus femoris, vastus intermedialis,
vastus medialis, vastus lateralis.)
Tibialis anterior
Abdominus rectus
External obliques
Biceps brachii
24. Muscular System
State the origin and insertion of the following
muscles:
(show a picture of each with your answer)
Posterior Muscles
Trapezius
triceps brachii
latissimus dorsi
gluteus maximus
hamstrings group (biceps femoris,
semitendinosus, semimembranosus)
gastrocnemius
soleus
erector spinae
