Science 4

1. • Touch your face.
What can you feel underneath our skin?
Do you know what enables you to
move the parts of your face as you
smile or make a face?

2. - Facial muscles are attached underneath
the skin that enables to lift an eyebrow,
blink the eyelids, or wrinkle the forehead.

4. MUSCLES
 Body tissue that give shape or form to the body
 Body comprises more than 600 muscles
 Each muscle is made up of fibers, and fibers are grouped into
bundles around 150 fibers in each bundle.
 It is the sources of power and motion for the body.

5. Types of Muscle
1. Voluntary Muscles – move when your brain tells them to
perform such as movements as sitting, jumping, and standing.
These muscles are connected to the bones by tissue called
tendons. Muscles connected to the bones work in pairs, if it
contract it becomes shorter, they pull on the bones, and cause
your arms and legs to move. Contraction and relaxation of
muscles help the body to move and perform different activities.
2. Involuntary Muscles – move even without your brain ordering
them to do so. They include those in the stomach.

6. Cardiac Muscle
- Muscle found in the heart
- It helps the heart to pump blood

8. Poliomyelitis or Polio
 Highly contagious disease of the
muscles caused by virus
 Virus transmitted by direct contact
with a person affected with polio
 Characterized by inflammation of the
muscle fibers affecting primarily the
muscles in the shoulders, upper
limbs, pelvis, and thighs.
SYMPTOMS: (early stage) fever,
headaches, joint and limb pains,
vomiting, and stiffness in the neck.
Number of cases include paralysis
and it can be permanent.
TREATMENT: not yet discovered,
only immunization of very young
infants (protection from the viral
disease

10. Muscular Dystrophy (MD)
 Characterized by the muscles
gradually weakening until they stop to
function correctly.
 Caused by the disorder in the body in
which the body does not produce
proteins that are needed to build
healthy muscles.
 Person with MD will loss ability to
walk, sit, and move the arms and leg
 The heart’s muscle might be affected
and cannot be able to do its function,
and also with the lungs.
SYMPTOMS: early stage doesn’t
show any, they just have overall
feeling of weakness in the muscles.
For worse as they get older they
have to use crutches, walkers, and
wheelchairs
TREATMENT: doctor’s prescribe
medication like steroids to help the
muscle stronger, and he/she do
special exercise to prevent the
further weakening of the muscles.

12. Proper Care
1. Eat balance meal with proteins and mineral that keep
the muscles healthy and strong and provide energy.
Example of food are fish, meat, milk, cheese, and eggs.
2. Exercise and do some physical activities to keep the
body condition and keep the muscles in good shape.
3. It is important to take a rest after doing an activity or at
the end of the day to help the muscles recharged and
repaired.