Science 8—February 11, 2015
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Function of the muscular system— to move
the body
Two types of muscles—
◦ Voluntary muscles
 Muscles you are able to control
◦ Involuntary muscles
 Muscles you can’t control
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Muscles work in a very simple way. All they
do is tighten up - that is, contract - and
relax.
Muscles can only pull. They never push.
The muscular system includes three types of
muscles. They are smooth, which are found
on the walls of internal organs, cardiac, which
is found only in the heart, and skeletal
muscles, which help strengthen the body and
connect to bones.
Digestive system—
Function!!
Process that breaks down
food into small molecules
so they can move into the
blood
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Both mechanical and chemical digestion
Mechanical—breaks down food by chewing
and churning
Chemical—breaks down food with the help of
enzymes into substances that cells can
absorb and use
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Food passes through the mouth, esophagus,
stomach, small intestine, large intestine,
rectum, and out the anus.
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http://www.sheppardsoftware.com/health/an
atomy/digestion/digestion_game_2.htm
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Your immune system is a complex groups of
defenses that your body has to fight disease.
It is made up of cells, tissues, organs, and
body systems that fight bacteria, viruses,
harmful chemicals, and cancer cells.
Circulatory system contains white blood cells
that engulf and digest foreign organisms and
chemicals.
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Your respiratory system contains cilia and
mucus that trap pathogens. Another term for
pathogen is microorganisms
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When your immune system recognizes a
foreign protein or chemical, it forms
antibodies.
An antibody is a protein made by an animal in
response to a specific antigen.
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The nervous system is the communication
system of the body.
It is the first control system of your body
using impulses.
The nervous system will respond to a
stimulus that is any change inside or outside
your body that brings about a response.
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A cat jumps when startled by a loud noise.
This is an example of an organism sensing
and responding to its external environment.
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The endocrine system is the system of
glands, each of which secretes a type of
hormone directly into the bloodstream to
regulate the body.
The endocrine system is the second control
system of your body.
Chemicals are the control mechanisms.
Endocrine chemicals called hormones are
produced in several ductless glands
throughout your body.
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http://www.bing.com/videos/search?q=endo
crine+system&qs=n&form=QBVR&pq=endoc
rine+system&sc=0-0&sp=1&sk=#view=detail&mid=8E2187FE28FF3B7
A21DD8E2187FE28FF3B7A21DD
This is the human body system produces the
hormones that regulate growth
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Function—the system that removes wastes
from the body
Organ system eliminates liquid and gaseous
wastes from the body?
Kidneys filter blood to remove wastes and
keep sodium, water, and other chemicals in
balance.
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http://www.bing.com/videos/search?q=excretory+system&qs=n
&form=QBVR&pq=excretory+system&sc=0-0&sp=1&sk=#view=detail&mid=5D21400A28862F49DE3A5D21400A2
8862F49DE3A
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The kidneys are the major organs of the urinary system;
they filter wastes from all of the blood in your body.
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Parts of the digestive, circulatory, respiratory, and
urinary system work together as the excretory system.
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Also sweat glands in the skin
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http://www.bing.com/videos/search?q=integ
umentary+system&qs=n&form=QBVR&pq=in
tegumentary+system&sc=0-16&sp=1&sk=#view=detail&mid=B66BA7971276A66
AA638B66BA7971276A66AA638
The integumentary system is the organ
system that protects the body from damage,
comprising the skin and hair.
The skin is the largest organ of the body.
http://www.bing.com/videos/search?q=integumentary+s
ystem&qs=n&form=QBVR&pq=integumentary+system&sc
=0-16&sp=1&sk=#view=detail&mid=B66BA7971276A66AA638B66B
A7971276A66AA638
Reproduction is the process that continues life on Earth.
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Organisms that carry out sexual reproduction form eggs
and sperm to transfer genetic information from one
generation to the next.
Genes are composed DNA.
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An organism is born with a genetic
abnormality not present in any of its
ancestors. This abnormality is most likely the
result of mutation.
Organs and organ systems begin to develop
in humans before birth.
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The sum of all chemical reactions in the
human body is known as metabolism.
Cancer is best described as abnormal cell
division.
(
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The interaction of the skeletal and muscular
systems to produce locomotion is
coordinated by the nervous system
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Circulatory System—transport materials
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