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. (iii) State a function of X. (iv) State a function of Y. (b) (i) Show clearly on the diagram where you would expect to find cartilage. (ii) State one role of this cartilage.

Leaving Cert Biology Musculoskeletal System: The diagram shows the macroscopi

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.

The diagram shows the macroscopic structure of part of a long bone - Leaving Cert Biology - Question 3 - 2012

Worked Solution & Example Answer:The diagram shows the macroscopic structure of part of a long bone - Leaving Cert Biology - Question 3 - 2012

Name a long bone in the human body.

Name parts X, Y and Z in the diagram.

State a function of X.

State a function of Y.

Show clearly on the diagram where you would expect to find cartilage.

State one role of this cartilage.

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