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4. Uterus

4. Uterus. Hollow, muscular, pear-shaped organ Located medially in the anterior portion of the pelvic cavity Body of the uterus (22) : upper 2/3 Cervix (5) : lower 1/3 Connects to vagina (6) Cervical orifice (24) : opening from uterus to vagina. Uterine Wall.

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4. Uterus

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  1. 4. Uterus • Hollow, muscular, pear-shaped organ • Located medially in the anterior portion of the pelvic cavity • Body of the uterus (22): upper 2/3 • Cervix (5): • lower 1/3 • Connects to vagina (6) • Cervical orifice (24): opening from uterus to vagina

  2. Uterine Wall • Endometrium(20)– mucosal layer • Myometrium(21) - _______ layer • Perimetrium(23) – serosal (thin, watery-filled) layer

  3. 6. Vagina • Fibromuscular tube that extends from the uterus to the outside of the body • Located posterior to urinary bladder (11) and urethra (12), and anterior to rectum (14) (see Fig. 19.7 diagram) • Functions: • Conveys uterine secretions • Receives penis during intercourse • Channel for birth

  4. Vaginal Wall • Inner mucosal layer • LACKS mucosal glands • Mucous comes from uterine glands and vestibular glands at mouth of vagina • Middle muscular layer • Mostly smooth muscle (involuntary) • Bulbospongiosus muscle (voluntary) closes off vaginal orifice (7)

  5. Vaginal Wall, continued….. 3. Outer fibrous layer • Dense connective tissue • Attaches vagina to surrounding organs • Urethra (13) • Rectum (14)

  6. Female External Accessory Organs • Labia majora • Labia minora • Clitoris • Vestibule

  7. 9. Labia Majora • Enclose and protect other external accessory organs • Correspond to male scrotum • Composed of 2 rounded folds of adipose tissue, smooth muscle, and skin that lie on either side of other the other accessory organs • Anterior ends join to form the mons pubis

  8. 8. Labia Minora • 2 flattened folds that lie between the labia majora • Join with the labia majora posteriorly • Merge anteriorly to form a protective, hoodlike covering around the clitoris

  9. 10. Clitoris • Small projection at the anterior end of the vulva (the external accessory organs that surround the vaginal opening) • Corresponds to male penis: • 2 columns of erectile tissue (corpora cavernosa) • Glans, erectile tissue at anterior end, contains sensory nerve endings • So what would be its function?

  10. Vestibule • The space enclosed between the labia minora • Vestibular glands: • 2 at the opening of the vagina • Correspond to male bulbourethral glands (FUNCTION?) • Vestibular bulbs: • lie beneath the mucosa of the vestibule on either side • A mass of erectile tissue

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