HUMAN BODY
SKELETAL AND MUSCULAR SYSTEM
Bones give us shape,
support, and protection
 Born with 300 bones, but as
you age, some bones fuse
together, an adult has 206
bones
 Largest bone: femur
 Smallest bone: stapes
(located in your ear)
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SKELETAL AND MUSCULAR SYSTEM
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Bones cannot move on
their own, they need
muscle to work.
SKELETAL/MUSCULAR SYSTEM
Joints help humans swivel, bend, curl, pivot, and
turn.
 Joints are points where 2 or more bones are
joined together by muscles.
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CIRCULATORY SYSTEM
What is the largest
muscle in the body?
 What does the heart
do?
 Where does blood go?
 Arteries are red
because they are
carrying oxygen.
 Veins are blue
because they do not
have oxygen.
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REPERTORY SYSTEM
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We breathe by taking in air
through our nose and mouth.
The air then passes through the
trachea (windpipe) into the
lungs.
The lungs swap oxygen for
carbon dioxide with the blood
stream.
The diaphragm is a muscle that
helps push out my lungs when
they are filling up with air.
The diaphragm also help let my
lungs back in to squeeze out the
air.
DIGESTIVE SYSTEM
DIGESTIVE SYSTEM
Canines (sharp and
pointy shapes used for
cutting and tearing)
 Incisors (big, flat
wedge shapes used for
biting off food)
 Bicuspids or
premolars (2-pointed
shapes for grinding)
 Molars (flat, squared
shapes used for
grinding)
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DIGESTIVE SYSTEM
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After the mouth, the food passes through a tube
in your throat called the esophagus.
The food passes through the esophagus into the
stomach.
 Muscles move the walls of the stomach to mash
up the food.
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DIGESTIVE SYSTEM
The small intestine squeezes the food through a
20 foot long tube that is coiled up in the body.
 The small intestine pulls nutrients out of the food
and is taken into the bloodsteam.
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The large intestine takes the water out of the
food and pushes out the solid waste.
NERVOUS SYSTEM
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The brain contains nerves
that send messages all over
the body through other
nerves.
The brain is part of the
central nervous system
along with the spinal cord.
The spinal cord is a bundle
of nerves that relay
messages from the brain to
different parts of the body.
The brain also receives and
process messages from our
senses.
ENDOCRINE SYSTEM
A system of glands
that helps the body
function.
 It contains a group of
glands that release
hormones (special
chemicals) into the
body.
 Controls: body
temperature, sleep,
hunger, growth sweat,
“fight” or “flight”, male
or female
characteristics, etc
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