Topic 6 : The Respiratory System Flashcards

1
Q

What is the primary function of the respiratory system

A

To supply the blood with oxygen so that the blood can deliver oxygen to all parts of the body

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2
Q

How does the respiratory system supply the blood with oxygen

A

By breathing

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3
Q

When we breathe in oxygen what do we exhale

A

Carbon dioxide

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4
Q

What body parts achieve respiration

A

Mouth, nose, trachea, lungs and diaphragm

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5
Q

When we breathe in oxygen through the mouth and nose what does it pass through

A

The larynx (where speech and sounds are produced) and the trachea (a tube that enters the chest cavity)

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6
Q

What are the two smaller tubes that the trachea splits into called

A

Bronchi

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7
Q

What does the bronchus divide into

A

Bronchial tubes

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8
Q

Where do the bronchial tubes lead directly too

A

The lungs

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9
Q

What are the spongy, air filled sacs called in your lungs

A

Alveoli

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10
Q

Roughly how many alveoli are in adult lungs

A

600 miillion

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11
Q

What are the alveoli in your lungs surrounded by

A

Capillaries

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12
Q

What does the inhaled oxygen pass into

A

The alveoli, then diffuses through the capillaries into the arterial blood

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13
Q

What blood enters the capillary network from the heart (pulmonary artery)

A

Deoxygenated

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14
Q

What blood enters the heart (via the pulmonary veins)

A

Oxygenated

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15
Q

What does waste-rich blood release

A

Carbon dioxide

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16
Q

What do you exhale out of your lungs

A

Carbon dioxide

17
Q

What helps pump the carbon dioxide out of the lungs and pull oxygen into the lungs

A

The diaphragm

18
Q

What is the sheet of muscle (shaped like a parachute) that lies across the bottom of the chest cavity

A

The diaphragm

19
Q

What does the diaphragm do make us breathe

A

Contracts and relaxes

20
Q

Oxygen is pulled into the lungs when the diaphragm

A

Contracts

21
Q

Carbon dioxide is pumped out of the lungs when the diaphragm

A

Relaxes