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NEETZoologyLocomotion and Movement

In the human skeletal system, a cup-shaped bone 'X' covers the knee ventrally. Another group of bones 'Y' forms the ankle. Identify the bone 'X' and the exact number of bones in group 'Y' in a single hindlimb.

Options

  1. AX - Patella, Number of Y - 8
  2. BX - Fibula, Number of Y - 7
  3. CX - Patella, Number of Y - 7
  4. DX - Patella, Number of Y - 14

Correct answer

C. X - Patella, Number of Y - 7

Step-by-step solution

According to NCERT, a cup-shaped bone called the patella covers the knee ventrally. Therefore, 'X' is the patella. The ankle bones are known as tarsals. In a single human hindlimb, there are exactly 7 tarsal bones. Therefore, the number of bones in group 'Y' is 7. The option with 8 incorrectly represents the number of carpals (wrist bones), while 14 represents the number of phalanges. Answer: X - Patella, Number of Y - 7

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