Based on this close-up view, part 7 appears to be the vas deferens (also called the ductus deferens). The vas deferens is a tube that carries sperm from the epididymis to the ejaculatory duct. Now I have identified all seven parts and can provide a complete answer.
Here is the solution to the problem, identifying each part of the male reproductive system and explaining its function:
1.
Testes (Testicles): These are the primary male reproductive organs responsible for producing sperm (spermatogenesis) and secreting testosterone, the main male sex hormone.
2.
Penis: This is the external male genital organ with dual functions - it serves as the organ for urination (passing urine from the body) and sexual intercourse (delivering sperm into the female reproductive tract during ejaculation).
3.
Epididymis: This is a coiled tube located at the back of each testicle. It stores and matures sperm after they are produced in the testes, and transports them to the vas deferens.
4.
Seminal Vesicles: These are glands that produce a significant portion (about 60-70%) of the fluid that makes up semen. The fluid contains fructose, which provides energy (nutrition) for sperm.
5.
Prostate Gland: This gland produces a milky, alkaline fluid that is added to semen. This fluid helps to nourish and protect sperm, and also helps neutralize the acidity of the vaginal tract to improve sperm survival.
6.
Scrotum: This is the pouch of skin that holds and protects the testes. It regulates the temperature of the testes by moving them closer to or farther from the body, maintaining the optimal temperature for sperm production.
7.
Vas Deferens (Ductus Deferens): This is a muscular tube that transports mature sperm from the epididymis to the ejaculatory duct in preparation for ejaculation. During ejaculation, sperm travels through the vas deferens to mix with fluids from other glands to form semen.
Parent Tip: Review the logic above to help your child master the concept of reproductive worksheet.