Download The Muscular System

The Muscular System
By: Abby Norton
Muscular System
•
The human body contains anywhere
from 640 to 850 individual muscles.
There is no exact number of muscles
agreed on because different experts,
or scientist, group them into different
categories.
•
The Muscular system moves the body
and allows the organs to be able to
do what they were designed to do.
Without the muscles, the body,
would not have the normal processes
of breathing, blood circulation,
digesting food, or even moving. A
person cannot live without their
muscular system functioning their
body.
Types of Muscular Tissue
• There are three different types of tissue in the muscular system.
They are:
1. Cardiac
2. Skeletal
3. Smooth
• The skeletal muscles are attached to the bones of the body and
have the main job of providing the pulling power for the movement
of the body. These are movements that we can control ourselves.
• The smooth muscles are muscles that contract and relax without
our control. They move in order to keep some of our internal
organs working properly. For example, they are around our
stomach, lungs, and intestines.
• The cardiac muscle, or heart, is a muscle that pushes blood out into
the arteries and throughout your body.
The Functions
There are many functions of the muscular system.
These functions are:
–
–
–
–
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Circulation
Digestion
Heat Production
Movement
Shaping the Body & Maintaining Posture
Muscular Functions
• Circulation
The cardiac muscle, the heart, pushes blood throughout the body by
contracting and relaxing. This causes circulation of blood and oxygen
throughout in the body.
• Digestion
The muscular system plays a role in the digestive process by pushing the
food through the body. It churns the food in the stomach to help absorb
energy and nutrients before it is passed through.
• Heat Production
Muscles help regulate the body’s temperature. When it is hot, the
muscles redistribute heat to the skin and causes the body to sweat. When
it is cold, the body shivers, which causes the muscles to contract and
product heat to help the maintain normal body temperature.
• Movement
The most common known function of muscles is movement. It works with
the central nervous system to direct the muscles to move according to the
situations. Muscles have the strength to move the bones to perform an
action. These actions are voluntary, that means we chose to make these
movements. Movements include running, hopping, skipping, jumping,
lifting, biking and many other actions.
• Shaping the Body & Maintaining Posture
Skeletal muscles are attached to the bones with ligaments and tendons.
When making a movement, muscles contract or relax and can also be
stretched further to allow maximum stability. When a person feels strain
on their muscles, they begin to slouch over and cannot stand properly.
The muscles in the torso have a constant tension to help keep good body
posture. Muscles tension also help maintain the balance of the body.
How the Muscular System works with other systems
• Digestive System - The muscular system interacts with the digestive system
from chewing the food in the jaw all the way to the stomach and into the
intestines of the digestive system.
• Skeletal System –The muscular system plays a role in the skeletal system by
attaching to the bones and providing support and movement.
• Immune System - The muscular system plays a role in the immune system by
acting as a pump for the lymph vessels since the lymph system does not have a
pump.
• The Circulatory System - The muscular system plays a role in the circulatory
system by being the pump for the entire system, the heart.
• The Respiratory System - The muscular system plays a role in the respiratory
system through the diaphragm. The diaphragm is the organ that causes the
lungs to inflate and deflate.
Interesting Facts
• Eye muscles are the busiest muscles in the body. Scientists
estimate they may move more than 100,000 times a day!
• The forearm muscles are responsible for almost all of the
hand movements and the various types of activities the hands
can perform.
• Without the use of working forearm muscles, it would be
impossible to play a guitar, write words, swing a golf club, lift
heavy weights or even slap a high five.
Bibliography
• http://www.factsaboutmuscles.com/forearmmuscle/forearm_musc
le.html
• http://www.unp.me/f150/muscular-system-functions143366/#ixzz1pnXgeosa
• eHow.com http://www.ehow.com/about6296493muscular-workother-systems-body.html#ixzz1pnOqeuW2
• http://www.ehow.com/howdoes4913630functions-humanmuscular-system.html#ixzz1pnZkig5G
• Mrs. Hunt
• Mrs. Hunt’s Knomi page
• http://www.unp.me/f150/muscular-system-functions-143366/
• http://www.ehow.com/how-does_4913630