Answer: Endometrium (uterine lining).
- A Cervix, the narrow lower part of the uterus
- B Ovary, where eggs are normally stored
- C Endometrium (uterine lining)
- D Fallopian tube, where fertilization usually occurs
Correct answer: C. Endometrium (uterine lining)
Explanation: The blastocyst implants into the endometrium (inner lining of the uterus) about 6-7 days after fertilization. The endometrium is prepared by progesterone to receive the embryo.
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.