What is the medical term for an undescended testis?

50. The corpus spongiosum surrounds the urethra.

The correct option is B.

$$\boxed{\text{B. Urethra}}$$

51. Varicocele is most common on the left side due to the anatomical drainage of the left testicular vein into the left renal vein.

The correct option is B.

$$\boxed{\text{B. Left side}}$$

52. Cryptorchidism is the medical term for an undescended testis.

The correct option is A.

$$\boxed{\text{A. Undescended testis}}$$

53. Torsion of the testis involves the twisting of the spermatic cord, which compromises the blood supply, primarily affecting the testicular artery.

The correct option is A.

$$\boxed{\text{A. Testicular artery}}$$

54. Benign prostatic hyperplasia (BPH) primarily affects the transitional zone of the prostate.

The correct option is C.

$$\boxed{\text{C. Transitional zone}}$$

55. PSA (Prostate-Specific Antigen) is a protein produced by the prostate gland.

The correct option is B.

$$\boxed{\text{B. Prostate}}$$

56. The segment of the fallopian tube closest to the ovary, which features fimbriae that sweep over the ovarian surface to capture the ovum, is the infundibulum.

The correct option is C.

$$\boxed{\text{C. Infundibulum}}$$