The ejaculatory duct:

Correct Answer: A

Rationale: The correct answer is A because the ejaculatory duct is formed by the joining of the deferent duct (vas deferens) with the seminal vesicle duct. This is important for transporting sperm and seminal fluid towards the urethra for ejaculation. Choice B is incorrect because the ejaculatory duct does not open directly into the urethra; rather, it joins with the urethra. Choice C is incorrect as the ejaculatory duct is not extratesticular; it is located within the prostate gland. Choice D is incorrect as the ejaculatory duct is not located within the testicle; it is formed outside the testicle by the union of other structures.

Correct Answer: A

Rationale: The correct answer is A: the uterus. The ovary connects to the uterus via ligaments called ovarian ligaments. This connection is essential for the transfer of eggs from the ovary to the uterus during the menstrual cycle and for providing support to the ovary. The other choices are incorrect as the ovary does not directly connect to the Fallopian tubes (B), rectum (C), or pelvic walls (D) via ligaments. The connection to the uterus is crucial for reproductive functions and maintaining the structural integrity of the female reproductive system.

Correct Answer: A

Rationale: The correct answer is A because Fallopian tubes are indeed funnel-shaped, with edges flared towards the uterus. This shape helps capture the released egg from the ovary and guide it towards the uterus for potential fertilization. The other choices are incorrect because the medial extremity does not display flares (B), the Fallopian tube is not directly linked to the uterus through the uterine ostium (C), and the lateral extremity does not open in the abdominal cavity (D). Therefore, choice A is the most accurate description of the Fallopian tubes based on their anatomy and function.

Correct Answer: C

Rationale: Step-by-step rationale: 1. The mammary gland is not an erectile organ, eliminating choice A. 2. It is not part of the internal genital organs, ruling out choice B. 3. The mammary gland is indeed an accessory gland of the female reproductive system, making choice C correct. 4. Lastly, the mammary gland is a pair of organs, which supports choice D as incorrect. Therefore, choice C is correct as the mammary gland functions as an accessory gland in the female reproductive system.

Correct Answer: A

Rationale: Step 1: Testosterone is a hormone primarily produced by the testes in males, regulating sperm production. Step 2: Gametes are reproductive cells (sperm in males), crucial for the reproductive cycle. Step 3: Therefore, the presence of testosterone regulating gamete production in a male is a normal part of the reproductive cycle. Summary: - Option B is incorrect as estrogen, a female sex hormone, does not produce sperm. - Option C is incorrect as progesterone is a hormone mainly involved in the menstrual cycle and pregnancy, not in males. - Option D is incorrect as insulin is a hormone related to glucose metabolism, not directly involved in the reproductive cycle.