Female Reproduction system

Anatomy of the Reproductive System

Overview of the Female Reproductive System

  • The female reproductive system consists of two primary components:
    • Uterus:
    • Hosts the developing fetus.
    • Produces vaginal and uterine secretions.
    • Facilitates the passage of sperm into the Fallopian tubes.
    • Ovaries:
    • Produce the female's egg cells (oocytes).

Female External Reproductive Organs

  • The external genital organs, collectively known as the vulva, include:
    • Mons Pubis:
    • A rounded mound of fatty tissue overlying the pubic bone.
    • Covered with hair post-puberty.
    • Contains oil-secreting (sebaceous) glands that secrete pheromones related to sexual attraction.
    • Labia Majora:
    • Large, fleshy folds of tissue surrounding other external genital structures.
    • Comparable to the male scrotum.
    • Contains sweat and sebaceous glands producing lubricating secretions.
    • Develops hair during puberty.
    • Labia Minora:
    • Smaller folds located inside the labia majora.
    • Surround the vaginal and urethral openings.
    • Can vary in size from very small to 2 inches wide.
    • Rich blood supply gives a pink color, which enhances sensitivity during sexual arousal as they engorge with blood.
    • Perineum:
    • The area between the vaginal opening and anus, varying in length from approximately 1 to more than 2 inches (2 to 5 cm).
    • Covered by skin akin to surrounding body regions, while the labia minora are lined with a mucous membrane.
    • Introitus:
    • The opening of the vagina, serving as the entryway for the penis during intercourse and an exit point for menstrual blood and childbirth.
    • Bartholin glands adjacent to the vaginal opening secrete lubrication fluid during stimulation.
    • Clitoris:
    • Located at the upper end of the labia minora, it is analogous to the male penis, being sensitive to stimulation and capable of becoming erect.
    • Clitoral stimulation can lead to orgasm.

Internal Genital Organs

  • The internal genital organs form the genital tract, which includes:
    • Vagina:
    • A muscular, elastic tube measuring about 4 to 5 inches long in adults.
    • Connects external genital organs to the uterus and serves as the birth canal.
    • The lower third is surrounded by elastic muscles that can contract rhythmically during orgasm.
    • Lined with a mucous membrane, kept moist by secretions from surface cells and cervical glands.
    • Vaginal discharge may appear as clear or milky white fluid, which is normal.
    • The structure has folds and wrinkles during reproductive years; smooth before puberty and after menopause.
    • Cervix:
    • The lower segment of the uterus protruding into the vagina.
    • Lined with a smooth mucous membrane.
    • Allows sperm to enter and menstrual blood to exit the uterus via the cervical canal, which expands during labor.
    • Acts as a barrier against bacteria except at certain times (ovulation, menstruation, labor).
    • Cervical mucus changes consistency around ovulation to facilitate sperm transport and can preserve sperm for around 5 days.
    • Uterus:
    • A thick-walled, pear-shaped organ situated mid-pelvic region, providing support to a developing fetus.
    • Anteriorly situated in front of the rectum and anchorage by ligaments.
    • Fallopian Tubes:
    • Two tubes measuring 10 to 13 cm, extending from the upper edges of the uterus towards the ovaries, with fimbriae that guide an egg upon release from an ovary.

Ovaries

  • Typically pearl-colored and walnut-sized, the ovaries:
    • Are connected to the uterus by ligaments.
    • Produce female sex hormones (estrogen and progesterone) and male sex hormones as well as egg cells contained in follicles. Each follicle houses one oocyte.

Male Reproductive System

  • Functions of the male reproductive organs include:
    • Production, maintenance, and transportation of sperm and semen.
    • Discharge of sperm into the female reproductive tract.
    • Production of male sex hormones.

Male External Reproductive Organs

  • Penis:
    • Comprises three parts: root, body (shaft), and glans (cone-shaped tip).
    • Glans is covered with foreskin (can be removed by circumcision).
    • Opening of the urethra is at the tip, allowing for the exchange of semen and urine.
  • Scrotum:
    • A pouch-like structure that houses the testicles and controls their temperature for optimal sperm development.
  • Testes:
    • Oval organs producing testosterone and sperm, containing coiled seminiferous tubules responsible for sperm production.

Internal Male Reproductive Organs

  • Epididymis:
    • Facilitates the transport, maturation, and storage of sperm cells from the testes.
  • Vas Deferens:
    • Transports mature sperm to the urethra for ejaculation.
  • Prostate Gland:
    • Contributes fluid to ejaculate, nourishing sperm.
  • Bulbourethral Glands:
    • Produce lubricating fluid for urethral and neutralization of acidity.
  • Seminal Vesicles:
    • Produce a fructose-rich fluid giving energy to sperm, contributing major volume to ejaculate.

Supporting Structures of Female Reproductive System

  • Pelvic Floor (Pelvic Diaphragm):
    • Composed of muscle creating a division between pelvic and perineal regions; includes three parts of levator ani muscle facilitating support and maintaining continence.
  • Bony Pelvis:
    • Protects pelvic structures, accommodates a growing fetus, and anchors pelvic support structures (includes sacrum, coccyx, hip bones).
  • Pelvic Ligaments & Fascia:
    • Include sacroiliac, sacrococcygeal, pubic symphysis, among others, supporting pelvic organs.
  • Blood Circulation:
    • Supplied by uterine, ovarian, and vesicle arteries, creating anastomosis for nutrient delivery to the reproductive system.

Nerves of the Reproductive System

  • Governed by the sympathetic and parasympathetic systems; efferent nerves (from T5 to T10) and afferent nerves (T11 and T12) facilitate functions within the uterus.

Breasts

  • Paired mammary glands located between the second and sixth ribs characterized by:
    • Lobes and Lobules: Approximately 15 to 20 lobes divided into lobules.
    • Acini: Terminal parts of glands producing colostrum and milk, lined with epithelial cells.
    • The ducts from lobules merge to create larger ducts leading to the nipple, which is surrounded by an areola that is typically darker than the surrounding breast skin.
    • Breast changes in size and nodularity due to cyclic ovarian changes, notably increased estrogen and progesterone levels before menstruation, influencing vascularity and gland growth.