Transcript Human Respiration

Warm Up 12
5/4
Oxygen
CO2
1. During cellular respiration, ____ is used
to break down sugar. ATP is produced
and _____ is released.
2.
The circulatory system works closely
with the ___________ system in
exchange of oxygen and CO2.
3.
What are some structures of the
respiratory system?
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Respiratory System
Function:
to bring about the
exchange of O2 & CO2
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1. Nose/Nasal Cavity
 a. filtered by cilia
 b. moistened by mucus
 c. warmed by blood
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2. Pharynx (throat)
Larynx (voicebox)
Trachea (windpipe)
◦ Epiglottis- flap of cartilage above larynx
◦ closes when swallowing
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3. Bronchi
◦ a. 2 large passageways to lungs
◦ b. Subdivide to bronchioles
◦ c. Ends in millions of tiny air sacs alveoli
◦ surrounded by capillaries
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4. Gas Exchange

by diffusion
◦ hemoglobin binds w/O2

350million alveoli
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Breathing
Inhalation
Exhalation
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How Breathing is Controlled

Medulla oblongata
Nerve impulses cause diaphragm to contract
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More CO2, faster you breathe
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Diseases

Bronchitis- bronchi become swollen &
clogged with mucus
Emphysema- loss of
elasticity,
damaged alveoli
Lung cancer- Deadly because cells spread to dozens of
other places
Accounts for about 27% of all cancer deaths and is by far
the leading cause of cancer death among both men and
women. Each year, more people die of lung cancer than of
colon, breast, and prostate cancers combined.
1.
What are the 3 things that happen as air
goes through the nasal cavity?
2.
What is the pharynx, larynx, and
trachea?
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Bronchi
Trachea
Brionchioles
Nose
mouth
Larynx
Pharynx
Trachea
Lung
Alveoli
Diaphragm
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