Fish Respiration Flashcards

1
Q

What happens first in respiration?

A

water enters mouth and gill rakers strains the debris

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2
Q

What does gill arch do?

A

Provide structural support for gills

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3
Q

What are the tiny hairs on the gill filaments?

A

lamellae

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4
Q

What does the lamellae do?

A

increases surface area to make gas exchange easier.

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5
Q

What happens in countercurrent exchange?

A

water comes into fish’s mouth is full of oxygen -> oxygen from water, diffuses into the lamellae and water has less oxygen -> blood coming into the lamellae has little oxygen and picks up more when after passing the gill filaments -> when blood returns to fish, it has high oxygen concentration

When water exits fish, it has less oxygen than when it began

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6
Q

What is diffusion in fish?

A

anything from a region of higher concentration flows to a region of lower concentration

bc there is more oxygen in the water compared to bloodstream, oxygen flows to the lamellae since there is less oxygen concentration

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7
Q

What is countercurrent?

A

water and blood flowing in opposite directions.
-maximizes diffusion

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8
Q

What is the part where oxygen is absorbed?

A

lamellae

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9
Q

Where does gas exchange take place

A

capillaries in the lamellae

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10
Q

What is the blood like when it arrives at the heart?

A

deoxygenated blood

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