Excretory system Flashcards

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1
Q

What is Excretion?

A

Excretion is the process of removing waste products from the body.

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2
Q

What wastes does Excretion include?

A

CO2, nitrogenous waste (urea), salt and water

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3
Q

What are the wastes generated by?

A

This is primarily carried out by the lungs (respiratory system), the kidneys (urinary system), and the skin (integumentary system).

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4
Q

What does the Liver play a vital role in?

A

the liver plays a vital role in converting toxic waste into less toxic material before it is removed from the body

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5
Q

What is a waste produced produced by cellular respiration?

A

Carbon Dioxide

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6
Q

What happens if CO2 is not removed from your body?

A

If CO2 is not removed from the body, it can change the pH of the blood and make it acidic.

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7
Q

What does the level of CO2 in our blood influence?

A

breathing rate, as it is important that it is removed efficiently from the body.

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8
Q

What do kidneys do?

A

Filter wastes from the blood

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9
Q

What does each kidney contain and how much of them?

A

Each kidney contains 1 million nephrons, the tiny structures that filter waste like urea, salts and water out of the blood and create urine.

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10
Q

What does Urine travel do?

A

Urine passes from the kidneys, down the ureters into the bladder

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11
Q

What do the kidneys play an important role in?

A

The kidneys also play an important role in regulating the water balance of the body

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12
Q

How does excretion occur through our skin?

A

Sweating

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13
Q

Sweat will remove what wastes from our body?

A

Sweat will remove some water, salts and small amounts of urea from the body.

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14
Q

What does the volume of water in our body do?

A

influences the concentration of the blood and other substances in it.

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15
Q

What happens when there is more water in our bodies than we need?

A

the kidneys will remove the excess creating dilute urine.

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16
Q

What happens when there is less water than our bodies need/we are low on water?

A

When the body doesn’t have enough water, e.g., lost from sweating, then the kidneys will create concentrated urine to keep as much water as possible in the body.

17
Q

What is the role of the liver?

A

Its role in excretion includes breaking down toxins (from drugs and other sources), breaking down excess amino acids into urea, which will be excreted by the kidneys.