Notes from JEE topper
the female reproductive systems
The female reproductive system is a complex and highly specialized system responsible for the production of female gametes (eggs or ova), nurturing and protecting a developing fetus during pregnancy, and facilitating childbirth. It consists of several organs and structures, each with specific functions. Here’s an overview of the female reproductive system:
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Ovaries: The paired ovaries are the primary female gonads responsible for producing eggs (ova) and female sex hormones, including estrogen and progesterone. Ovulation, the release of mature eggs, occurs periodically during the menstrual cycle.
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Fallopian Tubes (Oviducts): There are two fallopian tubes, one on each side of the uterus. They serve as conduits for transporting eggs from the ovaries to the uterus. Fertilization typically occurs within the fallopian tubes if sperm meets the egg there.
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Uterus (Womb): The uterus is a muscular, pear-shaped organ where a fertilized egg implants and develops into a fetus during pregnancy. If fertilization doesn’t occur, the uterine lining is shed during menstruation.
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Cervix: The cervix is the lower, narrow part of the uterus that connects to the vagina. It acts as a barrier, preventing pathogens from entering the uterus during non-fertile periods. During childbirth, the cervix dilates to allow the passage of the baby.
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Vagina: The vagina is a muscular tube connecting the cervix to the external genitalia. It serves as the birth canal during childbirth and also provides a passage for menstrual blood to exit the body.
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External Genitalia: Collectively known as the vulva, the external genitalia include the labia (lips), clitoris (sensitive organ involved in sexual pleasure), and vaginal opening.
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Mammary Glands: Although not directly involved in reproduction, the mammary glands are part of the female reproductive system. They produce milk to nourish and feed an infant after birth.
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Hormonal Regulation: The female reproductive system is under the control of various hormones, including estrogen, progesterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH). These hormones regulate the menstrual cycle, ovulation, pregnancy, and other reproductive processes.
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Menstrual Cycle: The menstrual cycle is a recurring series of events that prepares the body for pregnancy. It includes the growth and release of eggs, changes in the uterine lining, and menstruation (the shedding of the uterine lining if pregnancy does not occur).
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Pregnancy: When a sperm fertilizes an egg, the fertilized egg (zygote) implants in the uterine lining and begins to develop into an embryo and later a fetus. Pregnancy lasts approximately nine months and ends with childbirth.