Hello everyone! Below, you’ll find an attached image of my Activity 8 – The Reproductive System.

Reproductive System: The organs and tissues that produce gametes, or sperm and eggs, as well as those that aid in fertilization and gestation, make up the reproductive system. The ovaries, fallopian tubes, uterus, and vagina make up the female reproductive system, whereas the testes, epididymis, vas deferens, prostate gland, and penis are found in the male reproductive system. Together, these organs enable the production and movement of gametes, aid in fertilization, promote the growth of the embryo, and ease birthing.

1. Epididymis Human Cross-Section (c.s.): Every testicle has a tube called the epididymis that is tightly wound and situated on the posterior surface. The human epididymis is a structure lined by pseudostratified columnar epithelium, as seen in a cross-section. Stereocilia in the epididymal epithelium serve as a habitat for sperm maturation and storage while also absorbing surplus fluid. Layers of connective tissue and smooth muscle envelop the epithelium. Sperm maturation and transit from the testes to the vas deferens depend heavily on the epididymis.

2. Umbilical Cord Section: The developing fetus and the placenta in the womb are connected by a flexible tissue called the umbilical cord. Three major vessels may be seen in a segment of the umbilical cord: one umbilical vein, two umbilical arteries, and one umbilical artery, all encircled by a gelatinous material known as Wharton’s jelly. While the umbilical vein transports oxygenated blood from the placenta to the fetus, the umbilical arteries transfer deoxygenated blood from the fetus to the placenta, where it is oxygenated. The umbilical cord acts as a conduit for the mother and fetus to exchange waste products, oxygen, and nutrition.

3. Ovary Human Cross-Section (c.s.): The main reproductive organs in women are the ovaries, which also produce female sex hormones and eggs, or oocytes. An outer cortex and an inner medulla make up the structure visible in a cross-section of a human ovary. Ovarian follicles in different developmental stages, each carrying an oocyte encircled by supportive cells, are found in the ovarian cortex. Nerves, connective tissue, and blood arteries are all found in the medulla. Ovulation, hormone production, the menstrual cycle, and reproductive health are all significantly influenced by the ovaries.

4. Human Epididymis: The posterior surface of each testicle contains the tightly coiled tube that is the human epididymis. Sperm maturation and storage take place there. The pseudostratified columnar epithelium lining the extremely convoluted duct that makes up the epididymis absorbs extra fluid and creates a milieu that is favorable to sperm development. The head, body, and tail are the three main sections of the epididymis, and each has a distinct role in the growth and storage of sperm. Sperm are driven from the epididymis into the vas deferens during ejaculation. From there, they travel toward the urethra and eventually leave the body.

REFERENCES:

Basta, M., & Lipsett, B. J. (2023, July 24). Anatomy, abdomen and pelvis: umbilical cord. StatPearls – NCBI Bookshelf. Retrieved May 29, 2024, from https://www.ncbi.nlm.nih.gov/books/NBK557389/#:~:text=The%20umbilical%20cord%20is%20a,arteries%20and%20one%20umbilical%20vein.

Boskey, E., PhD. (2024, May 9). The anatomy of the epididymis. Verywell Health. Retrieved May 29, 2924, from https://www.verywellhealth.com/epididymis-anatomy-4774615

Harrison, R. J. (2024, March 28). human reproductive system. Encyclopedia Britannica. https://www.britannica.com/science/human-reproductive-system

Professional, C. C. M. (n.d.). Ovaries. Cleveland Clinic. Retrieved May 29, 2024, from https://my.clevelandclinic.org/health/body/22999-ovaries