Question
The diagram below represents a section through a mammalian heart.
(a) Label the parts marked A ,B and C.
(b) State the structural differences between blood vessels labeled A and B.
(c) Explain why chamber C has thicker walls than the chamber labeled D
(a) Label the parts marked A ,B and C.
(b) State the structural differences between blood vessels labeled A and B.
(c) Explain why chamber C has thicker walls than the chamber labeled D
Answer
(a) A – Vena Cava
B - Aorta
C - Left ventricle
(b)
(c) To generate enough pressure; in order to pump to all parts of the body to a longer distance.
B - Aorta
C - Left ventricle
(b)
| A (artery) | B (vein) |
|---|---|
| Narrow Lumen | Wide Lumen |
| Thick muscular elastic walls | Thin less muscular elastic walls |
| Valves only at the base where it leaves the heart | Has valves at intervals throughout their length |
(c) To generate enough pressure; in order to pump to all parts of the body to a longer distance.
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