Female reproductive system
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The document summarizes the major organs of the female reproductive system. It describes how the ovaries produce eggs and hormones, the fallopian tubes catch eggs and transport them to the uterus, the uterus provides a protective environment for embryo implantation and fetal development, and the vagina is the birth canal. The cervix acts as a passageway during birth and the endometrial lining thickens each month to potentially support implantation of a fertilized egg.
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Female reproductive system
- 1. Female Reproductive System
- 2. Female Reproductive System Produce sex hormones Estrogen, Progesterone Produce egg (ova) Support & protect developing embryo Give birth to new baby
- 3. Major Organs Cervix Vagina Ovaries [gonads] Uterine tubes [fallopian tubes] Uterus
- 4. The Cervix The lower portion or neck of the uterus. The cervix is lined with mucus, known as cervical mucus Cervical mucus provides lubrication & sperm transport during sexual intercourse During ovulation secretion of cervical mucus increases in response to estrogen But when an egg is ready for fertilization, the mucus then becomes thin and slippery, offering a “friendly environment” to sperm
- 5. The Cervix At the end of pregnancy The cervix acts as the passage through which the baby exits the uterus into the vagina. The cervical canal expands to roughly 50 times its normal width for the passage of the baby during birth
- 6. The Vagina A muscular, ridged sheath connecting the external genitals to the uterus. Functions as a two-way street, accepting the penis and sperm during intercourse Serving as the avenue of birth through which the new baby enters the world
- 7. External genetalia Vulva—which runs from the pubic area downward to the rectum. Labia majora or "greater lips" are the part around the vagina containing two glands (Bartholin’s glands) which helps lubrication during intercourse. Labia minora or "lesser lips" are the thin hairless ridges at the entrance of the vagina, which joins behind and in front. In front they split to enclose the clitoris The clitoris is a small pea- shaped structure. It plays an important part in sexual excitement in females.
- 9. External genetalia The urethral orifice or external urinary opening is below the clitoris on the upper wall of the vagina and is the passage for urine Opening of the vagina is separate from the urinary opening and located below it. The hymen is a thin cresentic fold of tissue which partially covers the opening of the vagina. medically it is no longer considered to be a 100% proof of female virginity.
- 10. Ovaries Also known as female gonads They produce eggs (also called ova) every female is born with a lifetime supply of eggs They also produce hormones: Estrogen & Progesterone
- 12. Fallopian tubes [uterine tubes] Stretch from the uterus to the ovaries and measure about 8 to 13 cm in length. The ends of the fallopian tubes lying next to the ovaries feather into ends called fimbria Millions of tiny hair-like cilia line the fimbria and interior of the fallopian tubes. The cilia beat in waves hundreds of times a second catching the egg at ovulation and moving it through the tube to the uterine cavity. Fertilization typically occurs in the fallopian tube
- 14. Uterus Pear-shaped muscular organ in the female reproductive tract. The fundus is the upper portion of the uterus where pregnancy occurs. The cervix is the lower portion of the uterus that connects with the vagina and serves as a sphincter to keep the uterus closed during pregnancy until it is time to deliver a baby. The uterus expands considerably during the reproductive process. The organ grows to from 10 to 20 times its normal size during pregnancy.
- 15. Uterus The main body consists of a firm outer coat of muscle (myometrium) and an inner lining of vascular, glandular material (endometrium). The endometrium thickens during the menstrual cycle to allow implantation of a fertilized egg. Pregnancy occurs when the fertilized egg implants successfully into the endometrial lining.
- 16. Endometrium The endometrium is the innermost layer as a lining for the uterus During the menstrual cycle, the endometrium grows to a thick, blood vessel-rich, glandular tissue layer. This represents an optimal environment for the implantation of a blastocyst upon its arrival in the uterus.
- 17. Endometrium The endometrium is central, echogenic (detectable using ultrasound scanners), and has an average thickness of 6.7 mm. During pregnancy, the blood vessels in the endometrium further increase in size and number, forming the placenta, Placenta supplies oxygen and nutrition to the embryo & fetus.
Editor's Notes
- The vagina ends at the cervix, (cervical mucus changes: employed by birth control pills, shots and implants. One of the ways they prevent conception is to render the cervical mucus thick, sparse, and hostile to sperm.)
- It was thought to be proof of virginity as it is broken after the first sexual intercourse. However it is stretchable, and may break due to vigorous exercises, cycling, gymnastics or tampon use.Therefore
- They are among the first organs to be formed as a female baby develops in the uterus. At the 20-week mark, the structures that will become the ovaries house roughly 6 to 7 million potential egg cells. From that point on, the number begins to decrease rapidly. A newborn infant has between 1 million to 2 million egg cells. By puberty the number has plummeted to 300,000. For every egg that matures and undergoes ovulation, roughly a thousand will fail, so that by menopause, only a few thousand remain. During the course of an average reproductive lifespan, roughly 300 mature eggs are produced for potential conception. The ovaries produce these hormones throughout the fertile period of a woman's life. It is the hormones that control the menstrual cycle. As you get older and menopause approaches, the ovaries make less and less of these hormones and the periods eventually stop altogether. So the normal ovaries cannot usually be felt in a clinical examination except in young, thin women. The ovaries are the main source of female hormones (estrogen and progesterone). These hormones control the development of female body characteristics, such as the breasts, body shape, and body hair. They also regulate the menstrual cycle and pregnancy. What is estrogen? Estrogen is a group of female sex hormones that stimulate the appearance of secondary female sex characteristics in girls at puberty. Estrogen controls controls the growth of the lining of the uterus during the first part of the menstrual cycle, cause breast development in pregnancy and regulates various metabolic processes.
- (4 to 6 inches) = length called fimbria (Latin for "fringes" or "fingers").each tube has about about 20 to 25 Millions of tiny hair-like cilia line the fimbria and interior of the fallopian tubes. The cilia beat in waves hundreds of times a second catching the egg at ovulation and moving it through the tube to the uterine cavity. Other cells in the tube's inner lining or endothelium nourish the egg and lubricate it's path during its stay inside the fallopian tube. Once inside the fallopian tube, the egg and sperm meet and the egg is fertilized. If an egg doesn't become fertilized within 24 to 36 hours after ovulation, it will deteriorate and be removed by the body's immune system like any other dead cell in the body.
- Size = 3 in long x2 inch diameter Weighs about 1-1.5 oz Pregnancy – watermelon sized
- Endometrium is about 10% of uterus mass – myometrium almost 90% - thin outer coat called perimetrium This cyclic process – the menstrual cycle – results from the interaction between the female reproductive organs and the endocrine system.