Draw a labelled diagram of a transverse section and a labelled diagram of a longitudinal section through a human vein to show its structure - Leaving Cert Biology - Question 15 - 2016
Question 15
Draw a labelled diagram of a transverse section and a labelled diagram of a longitudinal section through a human vein to show its structure.
In each of the followin... show full transcript
Worked Solution & Example Answer:Draw a labelled diagram of a transverse section and a labelled diagram of a longitudinal section through a human vein to show its structure - Leaving Cert Biology - Question 15 - 2016
Step 1
Draw a labelled diagram of a transverse section and a labelled diagram of a longitudinal section through a human vein to show its structure.
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Answer
Transverse Section:
Draw a thin wall representation with a large lumen (greater than 50% total diameter).
Label the following:
Lumen
Muscle wall
Endothelium
Longitudinal Section:
Clearly depict a longitudinal vein with a valve.
Label the following:
Lumen
Wall
Endothelium/Valves.
Step 2
1. Transports blood out of the muscle of the heart.
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Cardiac or coronary vein.
Step 3
2. Brings blood away from the kidneys.
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Renal vein.
Step 4
3. Carries very little carbon dioxide.
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Pulmonary vein.
Step 5
4. Brings blood into the right atrium.
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Vena cava.
Step 6
5. Has capillaries at both ends.
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Hepatic portal vein.
Step 7
Briefly describe how blood is moved through veins.
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Answer
Blood is moved through veins primarily by the contraction of skeletal muscles which squeezes the veins, facilitating blood flow. Additionally, valves within veins prevent backflow, ensuring that blood moves toward the heart.
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