The diagram shows the macroscopic structure of part of a long bone - Leaving Cert Biology - Question 3 - 2012
Question 3
The diagram shows the macroscopic structure of part of a long bone.
(i) Name a long bone in the human body.
(ii) Name parts X, Y and Z in the diagram.
X.
Y.
Z... show full transcript
Worked Solution & Example Answer:The diagram shows the macroscopic structure of part of a long bone - Leaving Cert Biology - Question 3 - 2012
Step 1
Name a long bone in the human body.
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Answer
One example of a long bone in the human body is the femur.
Step 2
Name parts X, Y and Z in the diagram.
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Answer
X: Spongy bone or marrow
Y: Medullary cavity or marrow
Z: Compact bone
Step 3
State a function of X.
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Answer
Part X (spongy bone) provides strength and reduces weight, while also being involved in the production of blood cells.
Step 4
State a function of Y.
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Answer
Part Y (medullary cavity) is responsible for storing yellow marrow, which acts as a fat reserve and plays a role in the production of blood cells.
Step 5
Show clearly on the diagram where you would expect to find cartilage.
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Answer
Cartilage is typically found at the ends of long bones, covering the joint surfaces. It should be indicated as a smooth layer over the areas where bones articulate.
Step 6
State one role of this cartilage.
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Answer
One role of this cartilage is to prevent bone damage and facilitate smooth movement at the joints.
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