The cervix is a muscular, tunnel-like organ connecting the uterus and vagina, located in the pelvic cavity behind the bladder and in front of the rectum. It plays a crucial role in allowing fluids to pass between the uterus and vagina, facilitating menstruation, pregnancy, fertility, and vaginal delivery. The cervix is approximately an inch long but can vary in size, especially during childbirth when it shortens to allow the baby to pass through. The cervix’s structure includes the internal OS, endocervical canal, ectocervix, and external OS. It is lined with glandular and squamous cells, meeting at the transformation zone where cell changes often occur, making it a common site for abnormalities like cervical dysplasia or cancer. Regular Pap smears are essential for detecting these changes early (Cleveland Clinic, 2022).

––EPIDIDYMIS––

The epididymis is a long, coiled tube on the back of each testis that stores and transports sperm. It consists of three sections: the head, body, and tail. The head stores sperm until it is ready to mature. The body is a long, twisted tube where sperm matures over approximately one week. The tail connects to the vas deferens, which transports sperm to the ejaculatory duct. The epididymis is partially surrounded by a thin tissue called the tunica vaginalis and its walls are lined with pseudostratified columnar epithelial tissue (The Healthline Editorial Team, 2018).

––OVIDUCT (FALLOPIAN TUBE)––

The fallopian tubes are a pair of narrow ducts in the female abdominal cavity that transport sperm to the egg, provide a suitable environment for fertilization, and move the egg from the ovary to the uterus. Each tube is 10–13 cm long and 0.5–1.2 cm in diameter, lined with a mucous membrane with folds and papillae. The tubes have three muscle layers: spirally arranged inner fibers, circular middle fibers, and longitudinal outer fibers ending in fimbriae near the ovaries, forming the infundibulum. The infundibulum catches released eggs and guides them into the ampulla, the long central part of the tube. The isthmus connects the ampulla and infundibulum to the uterus, leading to the intramural part in the uterine wall. The mucous membrane secretes fluids containing calcium, sodium, chloride, glucose, proteins, bicarbonates, and lactic acid, aiding sperm and egg survival and transport. Cilia in the membrane help move the egg and sperm through the tubes. Sperm reach the infundibulum within hours, while the egg takes 3-4 days to reach the uterus. The cilia and muscular contractions facilitate this movement (The Editors of Encyclopaedia Britannica, 2024).

––SECRETORY ENDOMETRIUM (UTERUS)––

The uterus is a pear-shaped organ in the reproductive system of individuals assigned female at birth (AFAB). It serves key roles in reproduction, including hosting the fertilized egg during pregnancy, aiding in childbirth, and shedding the uterine lining during menstruation. During pregnancy, the uterus stretches to accommodate the growing fetus and contracts during labor to facilitate delivery. It has sections including the fundus, corpus, isthmus, and cervix. Positioned in the pelvis between the bladder and rectum, the uterus is supported by ligaments and consists of three layers: the perimetrium, myometrium, and endometrium. Its size can vary greatly, from the size of a lemon to that of a watermelon during pregnancy, and it typically tilts forward towards the abdomen, although variations such as retroverted or anteflexed uteruses exist (Cleveland Clinic, 2022).

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REFERENCES:

—–Cleveland Clinic. (2022, June 15). Cervix. https://my.clevelandclinic.org/health/body/23279-cervix

—–Cleveland Clinic. (2022, March 8). Uterus. https://my.clevelandclinic.org/health/body/22467-uterus

—–National Cancer Institute. (n.d.). Introduction to the reproductive system. https://training.seer.cancer.gov/anatomy/reproductive/

—–The Editors of Encyclopaedia Britannica. (2024, April 29). Fallopian tube | Anatomy & Function. Encyclopedia Britannica. https://www.britannica.com/science/fallopian-tube

—–The Healthline Editorial Team. (2018, January 23). Epididymis. https://www.healthline.com/human-body-maps/epididymis#1