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Use labelled diagrams to distinguish between the structure of an artery and that of a capillary - HSC - SSCE Biology - Question 24 - 2014 - Paper 1
Question 24
Use labelled diagrams to distinguish between the structure of an artery and that of a capillary. Relate one structure of a capillary to its function.
Worked Solution & Example Answer:Use labelled diagrams to distinguish between the structure of an artery and that of a capillary - HSC - SSCE Biology - Question 24 - 2014 - Paper 1
Step 1
Use labelled diagrams to distinguish between the structure of an artery and that of a capillary.
Answer
To distinguish between the structure of an artery and that of a capillary, we can create the following labelled diagrams:
Diagram of an Artery
- Thick muscular wall: This structure allows arteries to withstand high pressure from the heart.
- Narrow lumen: This maintains blood pressure.
Diagram of a Capillary
- One cell thick wall: This allows efficient exchange of substances between the blood and tissues.
- Wide lumen: This facilitates slow blood flow, allowing for more exchange.
Step 2
Relate one structure of a capillary to its function.
Answer
One key structure of a capillary is its one cell thick wall. This structure facilitates the diffusion of small molecules such as oxygen and nutrients in and out of the bloodstream, ensuring efficient exchange between blood and surrounding tissues.