The document discusses the muscular system, including that it has over 700 muscles that control movement by pulling against bones. It describes three main types of muscles - voluntary skeletal muscles, involuntary smooth muscles like in the digestive system, and cardiac muscles in the heart. Muscle cells contain thin actin strands and thick myosin filaments that give muscles their striated appearance. The document then lists and describes key muscles like the trapezius, deltoid, pectoralis major, and gastrocnemius. It explains the functions of some muscles like the trapezius stabilizing the shoulder blade and deltoid allowing arm movements. Muscles contract to pull bones and create movement in the body.

2. Energizer : Do the Gangnam Style!

3. Introduction
The muscular system is the fleshy
covering of the body. The body has more
than 700 muscles that give it form and
shape. All body movements are controlled
by the muscles which work by pulling
against the skeleton. Muscles in the body
are responsible for moving bones,
pumping blood, moving food through
digestive system, and controlling air
movement in and out of the lungs.

4. Voluntary muscles or skeletal muscles that
are attached to your bones so that you can
control some of your body parts.
Involuntary muscles or smooth muscles
are muscles that you can’t move like the
stomach and the intestine in the digestive
system. Cardiac muscles are specialized
involuntary muscles that are responsible
for the heart.

5. A muscle cell is more commonly called
muscle fiber. A muscle fiber is a bundle of
longitudinally arranged myofibrils, which
are composed of thin and thick muscle
filaments. Thin filaments consists two actin
strands and one regulatory protein while
think filaments are composed of myosin
molecules. These strands are responsible
for striated the appearance of the muscle
cells.

6. Anatomy
Latissimus Dorsi-is
Sartorius- Gastrocnemius
the
longest - is a very
muscle
in powerful
the human
body superficial
– is a
long pennate
thin
muscle muscle that that
is
runs in the down back part
the
length of the lower
of the
leg.
thigh.
Biceps Femoris-located
Gluteus Maximus-is
the larger, flat,
Pectoralis
Triceps Biceps
Brachii-the
Major- is a large
Brachii- the
muscle in chest, large fanning
muscle
across at the the
front
chest of your
from
the upper shoulder arm
to
the breastbone.
Abdominal
Muscles- are
flat muscles
that are
located at the
abdomen.
Deltoid- is the
triangular
muscle of the
shoulder that
forms the
rounded flesh of
the outer part of
the upper arm.
Trapezius- is a
flat, triangular
muscle that
covers the back
of the neck,
shoulders and
thorax.
Rectus Femoris-is
Achilles
Tendon- is a
tendon of the
posterior leg.
on the back
the largest
dorso-large lateral
muscle
muscle on the
trunk, posterior to
the arm, and
partly covered by
the trapezius on
its median dorsal
region.
Frontalis- is thin, of
connected to
a quadrilateral
form, and
intimately adherent
to the superficial
fascia.
of muscle the thigh
in the
originates at the back body that forms
at the
of
buttocks the your bulk upper of and the
extends
arm
to buttock an insertion on each
point
at side.
the back of knee.
the hip, and
helps extend or
raise the knee.

7. Physiology:
Frontalis- is to help an
individual lift his or her
eyebrows up, especially when a
person is looking up. It also
helps an individual adjust his or
her vision when the view is too
dim or distant.

8. Trapezius- is to stabilize the
shoulder blade, provide a
base for the movements of
the arm, and to create the
shoulder girdle for stability to
the upper body.

9. Deltoid- is used in all side
lifting movements and any
movement of the humerus
on the scapula.

10. Pectoralis Major- flexes
and rotates the humerus
and it keeps the arm
attached to the trunk of
the body

11. Triceps Brachii- allows for
extension and retraction.
Biceps Brachii- allows for
extension and retraction.

12. Latissimus Dorsi- has a synergistic role in
extension and lateral flexion of the
lumbar spine.
Abdominal Muscles- provide movement
and support to the trunk and assist in the
breathing process, these muscles serve as
protection for the inner organs ,and they
provide postural support and are important
in defining the form.

13. Gluteus Maximus- are responsible
for extension, abduction, lateral
rotation and slight medical rotation
of the hip joint.
Sartorius- helps to flex the lower
leg.

14. Biceps Femoris- allows you to jump higher
as it extends the thighs and hip movement.
Rectus Femoris- used to contract the
thigh.
Gastrocnemius- helps you point your toe
by pulling on your heel.

15. Achilles Tendon- connects
the large muscles in the
back of the lower leg.

16. How does the system work
Muscles work by contracting.
They contract to move the body.
They can only pull. They cannot
push. When a muscle contracts, it
becomes shorter and thicker so it
pulls a bone, making the bone
move. This results in the movement
of a body part.

17. Evaluation:
1) In what way does the muscles do in
order for the body to move?
2) What is the muscle that is located at the
front of the upper arm?
3) What is the muscle that is located at the
back of the upper arm?
4) ______ is commonly named for muscle
cell.
5) These are composed of thick and thin
muscles filaments.