Which of the following is one difference between bursae and tendon sheaths?

• A. Bursae are flattened sacs that reduce friction between moving structures, while tendon sheaths are elongated sacs that wrap around tendons.
• B. Bursae are only found in the heart, while tendon sheaths are found in the lungs.
• C. Bursae are responsible for producing synovial fluid, while tendon sheaths are not.
• D. Tendon sheaths contain bone tissue, whereas bursae do not.

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by understanding the anatomical structures mentioned in the problem: bursae and tendon sheaths. Bursae are small, flattened sacs filled with synovial fluid that reduce friction between moving structures, such as bones, muscles, and tendons. Tendon sheaths, on the other hand, are elongated tubular structures that wrap around tendons to reduce friction during movement.
2. Step 2: Analyze the first option provided: 'Bursae are flattened sacs that reduce friction between moving structures, while tendon sheaths are elongated sacs that wrap around tendons.' This statement aligns with the anatomical function and structure of bursae and tendon sheaths, so it is likely correct.
3. Step 3: Evaluate the second option: 'Bursae are only found in the heart, while tendon sheaths are found in the lungs.' This statement is anatomically incorrect because bursae and tendon sheaths are part of the musculoskeletal system and are not located in the heart or lungs.
4. Step 4: Assess the third option: 'Bursae are responsible for producing synovial fluid, while tendon sheaths are not.' This statement is incorrect because both bursae and tendon sheaths contain synovial fluid, but neither is responsible for producing it; synovial fluid is secreted by the synovial membrane.
5. Step 5: Examine the fourth option: 'Tendon sheaths contain bone tissue, whereas bursae do not.' This statement is incorrect because neither tendon sheaths nor bursae contain bone tissue; they are composed of connective tissue and filled with synovial fluid.