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External Genitalia - following childbirth o milk collects...

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External Genitalia (Vulva) o mons pubis: fatty rounded area overlying pubic symphysis Kevin Kelleher, MTC Biology 211 Study Notes Exam 4 10 o labia majora: elongated skin folds running posteriorly from mons pubis & enclosing labia minora o labia minora enclose recess called vestibule, which contains the external opening of urethra (anteriorly) & vagina (posteriorly) o clitoris: small protruding erectile tissue (corpora cavernosa) hooded by prepuce formed by junction of labia minora folds o perineum: diamond shaped region surrounding external genitalia - Mammary Glands o present in both sexes; normally only function in females o produce milk & nourish newborn baby o composed of modified sweat glands contained within a rounded skin-covered breast, anterior to pectoral muscles o glands consist of lobes separated form each other by fat & fibrous CT forming suspensory ligaments that support breasts o lobules within lobes contain alveoli that produce milk when a woman is lactating
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Unformatted text preview: following childbirth o milk collects in lactiferous sinuses & is passed into lactiferous ducts , which open to the outside of the nipple o invasive breast cancer is the most common cancer of U.S. women cancer usually arises from epithelial cells of ducts known risk factors include: early onset menses & late menopause; no pregnancies or first pregnancy later in life; previous history of breast cancer; family history of breast cancer (possible risk factors include overexposure to estrogens, cigarette smoking & alcoholism) hereditary forms (~ 10% of all cases) often stem from mutations in breast cancer susceptibility genes BRCA1 & BRCA2 can be detected by breast self-examination & mammography treatment includes radiation & chemotherapy, and surgery (radical mastectomy has been mostly replaced by lumpectomy or, if necessary, simple mastectomy) page7...
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