Download Unit 8 Lesson 3

Unit 8 Lesson 3 What Body Parts Enable Movement,
Support, Respiration, and Circulation?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Florida Benchmarks
• SC.5.L.14.1 Identify the organs in the human
body and describe their functions, including the
skin, brain, heart, lungs, stomach, liver,
intestines, pancreas, muscles and skeleton,
reproductive organs, kidneys, bladder, and
sensory organs.
• SC.5.L.14.2 Compare and contrast the function of
organs and other physical structures of plants and
animals, including humans, for example: some
animals have skeletons for support—some with
internal skeletons, others with exoskeletons—
while some plants have stems for support.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Strong Bones and Mighty Muscles
• Bones are organs that support and protect your
body and store minerals.
• Bones are attached to muscles to help your body
move.
• Bones also make blood cells.
• Bones are made of a hard outer layer and a
spongy inner layer.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Strong Bones and Mighty Muscles
• The place where two or more bones meet is called
a joint.
• Ligaments connect the bones of a joint.
• Cartilage cushions the ends of bones.
• Bones, ligaments, and cartilage form the skeletal
system.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Strong Bones and Mighty Muscles
• Muscles are organs that contract to produce
movement in the body.
• Muscles often work in pairs. One muscle contracts
while another muscle relaxes.
• Muscles are part of the muscular system.
• Muscle movement can be voluntary or involuntary.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Strong Bones and Mighty Muscles
• There are three types of muscles. The heart is
made of one type.
• The walls of blood vessels and organs are made of
another type of muscle.
• A third type of muscles pulls bones to help us
move.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Strength and Motion
• Plants can have thick stems to give their bodies
support. Some plants respond to touch.
• Some animals have a hard outer layer called an
exoskeleton.
• Other animals use flippers or tube feet to move in
water.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Breathe In, Breathe Out
• Organs in the respiratory system bring in oxygen
and release carbon dioxide.
• The lungs are spongy organs that expand to fill
with air.
• Air enters the body through the nose or mouth
and flows through a tube in the throat called the
trachea.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Breathe In, Breathe Out
• The trachea branches into two smaller tubes
called bronchi.
• Bronchi branch into many bronchioles in the
lungs.
• Tiny sacs called alveoli are attached to
bronchioles. They inflate and deflate as you
breathe.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Breathe In, Breathe Out
• Red blood cells in the alveoli absorb oxygen.
Identify the blood vessels and alveoli.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Asthma Attack
• Asthma is an illness that makes it hard for a
person to breathe.
• During an asthma attack, bronchi become swollen,
making the airways smaller.
• Pollen, air pollution, smoke, and allergies can
trigger an asthma attack.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Asthma Attack
• Why is it more difficult to breathe during an
asthma attack?
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Asthma Attack
• People can try to avoid asthma triggers.
• An inhaler is a device a doctor can prescribe to
deliver medication to the lungs.
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Beat It
• The heart is a muscular organ that pumps blood
throughout the body.
• When the top part of the heart relaxes, it fills with
blood.
• When the top part contracts, it squeezes blood to
the lower part of the heart.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Beat It
• When the lower part of the heart contracts, it
squeezes blood from the heart into vessels and all
parts of the body.
• Blood is made up of a clear liquid called plasma
and small structures called blood cells.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Beat It
• Red blood cells carry oxygen throughout the body.
• White blood cells help fight disease.
• Platelets stop bleeding by forming clots.
• Plasma carries nutrients throughout the body.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Beat It
• Arteries carry blood away from the heart. Veins
carry blood back to the heart.
• Oxygen and nutrients pass through capillaries to
the different parts of the body.
• The heart, vessels, and blood are all part of the
circulatory system.
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Unit 8 Lesson 3 What Body Parts Enable Movement, Support, Respiration, and
Circulation?
Got Lungs?
Circulation or Respiration?
• Spiders, birds, fish, and other animals have very
different organs for respiration and circulation.
• Plants take in air through openings in leaves
called stomata.
• Most plants transport fluids through plant vessels.
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