Final answer:
The vas deferens is the tube that carries sperm from the testicles, mixing it with seminal fluids to form semen, which is then ejaculated from the body. so, option 2 is the correct answer.
Step-by-step explanation:
The 18-inch tube that carries sperm away from the testicles and mixes it with other seminal fluids is known as the vas deferens (or ductus deferens). The vas deferens transports sperm from the epididymis, where they have matured, to the urethra. En route, the sperm mix with seminal fluids from various glands, including the prostate gland, which produce components of semen. This process leads to the formation of semen, a fluid that carries sperm through the urethra and out of the body during ejaculation.
The vas deferens is the 18-inch tube that carries sperm away from the testicles and mixes it with other seminal fluids.
The 18-inch tube that carries sperm away from the testicles and mixes it with other seminal fluids is called the vas deferens. It transports sperm from the epididymis to the urethra. The vas deferens is part of the male reproductive system and plays a crucial role in the process of ejaculation.