Answer: Midpiece (mitochondria).
- A Acrosome
- B Head (nucleus)
- C Midpiece (mitochondria)
- D Tail (flagellum)
Correct answer: C. Midpiece (mitochondria)
Explanation: The midpiece of the sperm is packed with mitochondria that produce ATP through aerobic respiration. This energy powers the movement of the flagellum (tail), propelling the sperm toward the egg.
The human male reproductive system: sperm formed in the testis mature in the epididymis and travel via the vas deferens, mixing with secretions of the seminal vesicle, prostate and bulbourethral glands. Image: Wumingbai, CC BY-SA 4.0, via Wikimedia Commons.
Concept context
Male and female reproductive systems, gametogenesis, fertilization, implantation, pregnancy, and reproductive health.