The fleshy outer part of the female reproductive system where the opening to the vagina is located:

Correct Answer: C

Rationale: The correct answer is C: Vulva. The vulva is the fleshy outer part of the female reproductive system that includes the labia majora, labia minora, clitoris, vaginal opening, and urethral opening. It is where the opening to the vagina is located. The uterus (A) is a hollow, muscular organ where the fetus develops during pregnancy. The ovary (B) is the female reproductive organ that produces eggs and hormones. Vaginitis (D) is inflammation or infection of the vagina, not the outer part of the reproductive system. Therefore, the correct answer is C as it accurately describes the external female genitalia where the vaginal opening is situated.

Correct Answer: C

Rationale: Step 1: The epididymis is a structure where sperm mature and are stored. Step 2: The deferent duct (vas deferens) carries sperm from the epididymis to the urethra. Step 3: Since the deferent duct crosses the epididymis, choice C is correct. Summary: Choices A, B, and D are incorrect because they do not accurately describe the anatomical relationship between the epididymis and the deferent duct.

Correct Answer: C

Rationale: Step-by-step rationale: 1. The seminal vesicle secretes a fluid eliminated in the ejaculatory ducts. 2. This fluid provides nutrients and energy for the sperm. 3. It also helps to neutralize the acidic environment of the male urethra. 4. The fluid from the seminal vesicle combines with sperm to form semen for ejaculation. Summary: A: The seminal vesicle does not secrete androgenic hormones. B: Sperm cells are not secreted by the seminal vesicle. D: The seminal vesicle's fluid does not transport sperm cells; it provides support and nourishment for them.

Correct Answer: A

Rationale: The correct answer is A: prostate. Testosterone is primarily secreted by the testicular interstitial cells (Leydig cells) in the testes. The seminiferous tubules are responsible for spermatogenesis, not testosterone secretion. Straight tubules are involved in transporting sperm. The prostate gland produces prostatic fluid, not testosterone. Therefore, the prostate is not a structure that secretes testosterone.

Correct Answer: A

Rationale: Step 1: The cortical area of the ovary is the outer layer where follicles develop. Step 2: Primordial follicles are the earliest stage of follicle development, found in the cortex. Step 3: Mature follicles are developed follicles located deeper in the ovary, not in the cortex. Step 4: Secondary follicles are also more developed than primordial follicles, located deeper. Step 5: Blood vessels are important for supplying nutrients but are not specific to the cortical area. Therefore, the correct answer is A as primordial follicles are located in the cortical area, while other choices are found in different regions of the ovary.