Final answer:
The term for a small sac containing liquid like sem.en is a seminal vesicle. These glands contribute 60 to 70 percent of the sem.en's volume and provide fructose and alkalinity to nourish and protect sperm. The scrotum houses the testes and is involved in sperm maturation.
Step-by-step explanation:
The term for a small sac containing liquid, such as se.men, is a seminal vesicle. The seminal vesicles are a pair of glands in the male reproductive system that secrete a significant component of sem.en. This fluid makes up approximately 60 to 70 percent of the se.men's volume and is alkaline to protect sperm from acidic conditions. It also contains fructose and other nutrients which provide the energy that sperm require for motility.
Se.men itself is a fluid mixture that carries sperm from the male body during ejaculation. It is composed of sperm and fluids from various accessory glands, including the seminal vesicles. The alkaline seminal vesicle fluid nourishes the sperm and assists in their transportation.
The scrotum is the sac that contains the testes, found exterior to the body. While not a container for liquid, it is involved in the storage and maturation of sperm before they enter the seminal vesicles and mix with the glandular secretions to form sem.en.