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Identify the labels-A, B, C and D in the given diagram. [Figure: a human sperm with an oval head, a short neck, a coiled middle piece and a long tail. Label A points to the cap at the tip of the head, B to the large central part of the head, C to the…

Q.7 Identify the labels-A, B, C and D in the given diagram. [Figure: a human sperm with an oval head, a short neck, a coiled middle piece and a long tail. Label A points to the cap at the tip of the head, B to the large central part of the head, C to the small dark body just below the head, and D to the coiled region behind it.]

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Answer: The diagram is of a human sperm.

  • A – Acrosome (contains hydrolytic enzymes, sperm lysins, to penetrate the ovum).
  • B – Nucleus (haploid, in the head).
  • C – Neck with proximal centriole (helps in the first cleavage of the zygote).
  • D – Middle piece with mitochondrial spiral (supplies energy for movement).
Doubtly AI · 28 Oct 2026 AI-verified · Oct 2026 Report
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