Sexual Anatomy H&D Ch.4 Female Sexual Organs Female Sexual Organs Vulva Clitoris Mons pubis Labia Outer lips Inner lips Vaginal opening (introitus) Urethra Clitoris ?Just how difficult to find, just how elusive, is front and center?? ? Coupling Clitoris Highly sensitive sexual organ Glans in front of vaginal entrance; rest deep in body Only part with no known reproductive function Homologous to penis Mons Pubis Mons pubis (mons, mons veneris) Fatty pad of tissue under pubic hair Labia Outer lips (labia majora) Rounded pads of fatty tissue Covered with pubic hair Inner lips (labia minora) Hairless thin folds of skin Form clitoral hood Self-Knowledge ?Anatomy is destiny.? ? Freud Males Prominent external genitals Stable throughout life span Females Typically can?t see until puberty Changes throughout life span Both Insecurity Health concerns Hymen Hymen (?cherry,? ?maidenhead?) Varies in physical types Not sign of virginity If concerned about first coitus: Physician can cut neatly Women can stretch it by inserting finger into vagina and pressing on it Female Genital Cutting Sunna (B) Only procedure that could legitimately be called ?female circumcision? Excision (clitoridectomy) (C) Infibulation (D) Female Internal Organs Vagina Vestibular bulbs Skene?s gland (female prostate) Uterus Fallopian tubes Ovaries Female Internal Sexual and Reproductive Organs Vagina Vagina (birth canal) Tube-shaped organ Introitus Nerve supply mostly to lower third Some women have sensitive spot on front wall Pelvic floor muscles (pubococcygeus muscle) May be stretched in childbirth Vestibular Bulbs Vestibular bulbs Erectile tissue running under the inner lips Skene?s Gland Skene?s gland (female prostate, paraurethral glands, ?G-spot?) Secretes fluid biochemically similar to male prostate fluid Variation in size and output Uterus Uterus (womb) Cervix Fundus Body Three layers: Endometrium Myometrium Perimetrium or serosa Fallopian Tubes Fallopian tubes (oviducts, uterine tubes) Fertilization typically in infundibulum Ovaries Ovaries Produce eggs (ova) Manufacture estrogen and progesterone Contain numerous follicles Capsule that surrounds egg Breasts Not actually sex organs Clusters (15-20) of mammary glands, each with separate opening to nipple, surrounded by fatty and fibrous tissue Nipple Where milk ducts open Areola Area surrounding nipple Male Sexual Organs Male External Organs Penis (phallus) Scrotum (scrotal sac) External Parts of the Penis Uncircumcised penis Glans Meatus or urethral opening Body or shaft Corona Foreskin or prepuce External Parts of the Penis (cont?d) Circumcised penis Glans Meatus or urethral opening Body or shaft Corona Internal Parts of the Penis Corpora cavernosa Two bodies on top Corpus spongiosum Single body on bottom Urethra runs through middle Penis Size Considerable variation Average flaccid 6-10 cm (2.5-4?) ?Erection is the great equalizer? Average erect ?15 cm (6?) Masters and Johnson (1966): Large penis ? better lover Few nerve endings in top 2/3 of vagina Deeper penetration may not be noticeable Women report it?s important Male Genital Cutting Circumcision Supercision (superincision) Slit the length of foreskin on top Otherwise in tact Polynesia Subincision Slit on lower side along entire length to depth of urethra Urine excreted at base of penis Central Australia Male Genital Cutting (cont?d) Dorsal view of circumcised penis Shaft Circumcision scar Corona Glans Meatus Scrotum Scrotum (scrotal sac) Testes Inside the Testes Seminiferous tubules Manufacture and store sperm Interstitial cells Produce testosterone Epididymis, Vas Deferens, and Seminal Vesicles Epididymis High coiled tube on edge of testis Stores and matures sperm Vas deferens Tube which carries sperm out of scrotum, through prostate (ejaculatory duct), and to urethra Vasectomy Seminal vesicles Saclike structures that produce ?60% of seminal fluid Prostate and Cowper?s Glands Prostate Below bladder Secretes some fluid in semen Cowper?s glands (bulbourethral glands) Secrete clear alkaline fluid to neutralize acid in urethra Cancer of the Sex Organs Breast Cancer 2nd most common cancer in women Behind skin cancer Risk factors: Genetics Long-term HRT Obesity Diagnosis Breast exam, clinical exam, and mammogram Breast Cancer Surgeries Radical mastectomy Breast and underlying muscle and lymph nodes removed Lumpectomy Only lump and small bit of surrounding tissue removed Psychological impact Cancers of the Cervix, Endometrium, and Ovaries Most common cancers after breast cancer 95% cervical cancer caused by Human Papillomavirus (HPV) Pap test Highly accurate Detects long before symptoms Hysterectomy Surgical removal of uterus Used to treat all three cancers Pelvic Exam Cancer of the Prostate 2nd leading cause of cancer death in men after lung cancer Early symptoms: Frequent urination Difficulty urinating Difficulty emptying bladder Diagnosis Rectal examination Men 40+ should have annually Cancer of the Testes Young men?s disease Cause unknown First signs Painless lump in testes Slight enlargement or change in consistency of testes Pain in lower abdomen or groin Diagnosis Physical exam Testicular self-exam Ultrasound
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