Gas Exchange Flashcards

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1
Q

How does air pass into the lungs?

A

Through a tube called the trachea.

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2
Q

What prevent the trachea from collapsing during inhalation?

A

Rings of cartilage

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3
Q

Where does the air go after the trachea?

A

The air goes in two smaller tubes with have splitof from the trachea, whith one passing to each lung.

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4
Q

Where does the air go after the bronchi?

A

The bronchi subdivide into many smaller tubes called bronchioles.

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5
Q

Where does the air go after the bronchioles?

A

To the alveoli which are air sacs at the end of the bronchioles.

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6
Q

What happens at the alveoli?

A

This is where gases diffuse in and out of the bloodstream or the site of gas exchange.

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7
Q

What are some of the adaptations of alveoli?

A
  1. There are millions of them, which means that the lungs have a huge surface area.
  2. They have very thin walls, so the diffusion part is very short.
  3. The alveoli have a rich supply of blood capillieries, which maintains a concentration gradient in both directions.
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8
Q

How do we increase the rate of diffusion?

A

By breathing. Breathing brings fresh oxygen into the alveoli and takes away the carbon dioxide.

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9
Q

What is the thorax?

A

It is the top part of your body.

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10
Q

What separates the lower part of your body from the upper part?

A

The diaphragm

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11
Q

What protect the lungs?

A

The ribcage.

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