The respiratory and circulatory systems bring oxygen and nutrients to the cells.
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The respiratory and circulatory systems bring oxygen and nutrients to the cells. sinus. nose. mouth. epiglottis. trachea. lungs. The respiratory system is where gas exchange occurs. picks up oxygen from inhaled air expels carbon dioxide and water. Air exhaled. Air inhaled.

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The respiratory and circulatory systems bring oxygen and nutrients to the cells.

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The respiratory and circulatory systems bring oxygen and nutrients to the cells

The respiratory and circulatory systems bring oxygen and nutrients to the cells.


The respiratory and circulatory systems bring oxygen and nutrients to the cells

sinus

nose

mouth

epiglottis

trachea

lungs

The respiratory system is where gas exchange occurs.

  • picks up oxygen from inhaled air

  • expels carbon dioxide and water


The respiratory and circulatory systems bring oxygen and nutrients to the cells

Air exhaled.

Air inhaled.

Muscles contract and

rib cage expands.

Muscles and

rib cage relax.

Diaphragm flattens

and moves downward.

Diaphragm relaxes

and rises.

Breathing in driven by the diaphragm and muscles of the rib cage.

  • Air flows from areas of high pressure to low pressure.


Path of air

Path of Air

(Hair filters dust)

(Muscular tube)

(voice box with

epiglottis (flap))

(long, straight tube

in chest cavity)

(small tubes)

(Suspended in chest cavity bounded by ribs)

(Tiny air sacs surrounded by capillaries)

Alveoli

(Drives breathing)


The respiratory and circulatory systems bring oxygen and nutrients to the cells

ALVEOLI

GAS EXCHANGES

capillary

alveolus

co2

Co2 diffuses

into alveolus.

o2

O2 diffuses

into blood.

capillaries

Oxygen and carbon dioxide are carried by the blood to and from the alveoli.

  • oxygen diffuses from alveoli into capillary

  • oxygen binds to hemoglobin in red blood cells

  • carbon dioxide diffuses from capillary into alveoli


The respiratory and circulatory systems bring oxygen and nutrients to the cells

  • Asthma constricts airways.

  • Emphysema destroys alveoli.

  • Cystic fibrosisproduces sticky mucus.

Lung diseases reduce airflow and oxygen absorption.


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