Which part of the male productive tract is cut and sealed as part of a vasectomy?

A. Prostate: The prostate gland produces seminal fluid that nourishes and transports sperm but does not store mature sperm. Its main function is to contribute to the formation of semen.

B. Seminal Vesicle: The seminal vesicles produce a significant portion of the seminal fluid but do not store sperm. Instead, they provide nutrients for sperm and help form semen.

C. Epididymis: The epididymis is a coiled tube located at the back of each testis where sperm mature and are stored until ejaculation. It plays a crucial role in the maturation process of sperm.

D. Bulbourethral: The bulbourethral glands (or Cowper's glands) secrete a pre-ejaculate fluid that lubricates the urethra but do not store sperm.

A. It is the air in the lungs after maximal inhalation: Total lung capacity (TLC) refers to the total amount of air the lungs can hold after maximum inhalation.

B. It is the quantity of air that a person can move into or out of the lungs: This defines vital capacity, not total lung capacity.

C. It is the amount of air that remains in the lungs after a normal tidal expiration: This describes functional residual capacity, not TLC.

D. It is the maximum volume of air that can be exhaled from the lungs after maximum inhalation: This is the definition of vital capacity (VC), not total lung capacity.