The testicle vascularization:

Correct Answer: A

Rationale: The correct answer is A because the arterial vascularization of the testicle is indeed provided by the gonadal artery, which is a branch off the abdominal aorta. This is anatomically accurate as the gonadal artery supplies blood to the testicles. Choice B is incorrect because the venous drainage of the testicle is to the testicular vein, which drains into the inferior vena cava, not the internal iliac vein as stated in option B. Choice C is incorrect because the testicular artery, not the internal iliac artery, is responsible for the arterial supply to the testicle. Choice D is incorrect because the venous drainage of the testicle is not tributary to the inferior vena cava; instead, it drains into the left renal vein.

Correct Answer: D

Rationale: The correct answer is D because the ovary is not located in the right flank; it is located in the lower abdomen. A: The ovary is a pair organ, as there are two ovaries in the female reproductive system. B: The ovary is a gland with mixed roles, producing hormones and releasing eggs. C: The ovary is oval-shaped, which is anatomically correct. Therefore, choice D is incorrect as the ovary is not located in the right flank.

Correct Answer: D

Rationale: The correct answer is D: internal iliac vein. The veins of the ovary drain into the ovarian veins, which then connect to the pampiniform plexus, ultimately draining into the internal iliac vein. This pathway allows for the blood from the ovary to be carried back to the heart. The other choices (A, B, C) are incorrect as the ovarian veins do not typically open into the inferior vena cava, uterine vein, or renal vein.

Correct Answer: A

Rationale: The correct answer is A: Fallopian tubes. The external female genital organs include the vagina, vulva, and ovary, which are visible on the outside of the body. The fallopian tubes, however, are internal structures that connect the ovaries to the uterus. They are not part of the external genitalia. Therefore, the fallopian tubes do not fall under the category of external female genital organs. Choices B, C, and D are incorrect because they are all part of the external female genital organs.

Correct Answer: B

Rationale: Step 1: At fertilization, the sperm contributes either an X or Y sex chromosome. Step 2: The ovum always contributes an X sex chromosome. Step 3: If the sperm carries the Y chromosome, the resulting child will be male. Therefore, the correct choice is B. Summary: A: Incorrect. If the sperm contains the X chromosome, the child will be female. C: Incorrect. Ovule always contains an X chromosome. D: Incorrect. This choice combines correct and incorrect information, as the sperm must contain the Y chromosome for a male child.