Linking Gas Exchange, Digestion and Excretion Flashcards

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  • Make sure you understand the information on each card. If something's unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

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  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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How do the digestive, gas exchange and excretory systems together help your body cells?

They supply cells with nutrients and oxygen and remove waste products from the blood.

How does the digestive system help supply materials for respiration?

The small intestine absorbs glucose from digested food into the blood, which carries it to cells for respiration.

How do the lungs and blood work together to supply oxygen to body cells?

Oxygen diffuses from the air in the alveoli into the blood, and the blood carries it to cells around the body.

How is carbon dioxide removed from the body after respiration in cells?

Carbon dioxide diffuses from cells into the blood, is carried to the lungs and is breathed out.

How is urea formed and then removed from the body?

The liver makes urea from excess amino acids. The blood carries urea to the kidneys, which remove it in urine.

How do the kidneys and lungs both help to clean the blood?

The lungs remove carbon dioxide from the blood, and the kidneys remove urea, excess water and some mineral ions.

What substances are carried in the blood from the small intestine to body cells?

Digested nutrients such as glucose and amino acids are carried from the small intestine to body cells in the blood.

What waste substances are carried in the blood from body cells to the lungs and kidneys?

Carbon dioxide is carried to the lungs, and urea is carried to the kidneys.

Why is it important to remove excess water and mineral ions from the blood?

Removing excess water and mineral ions keeps the conditions around body cells steady so they can work properly.

How does drinking water show a link between digestion, circulation and excretion?

Water is absorbed from the gut into the blood, carried around the body, and any extra is removed by the kidneys in urine.