Anatomy Lab: week #12
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45 terms
Terms | Definitions |
|---|---|
 Scrotum | holds the paired oval testies outside the abdominopelvic cavity, temperature is lower than body temp in order to produce vible sperm |
| Epididymis | elongated structure running up the posterolateral aspect of the testis and capping its superior aspect. Forms first portion of the duct system & provides site for immature sperm entering it from the testis to complete their maturation process |
| Vas deferens | (sperm duct) arches superiorly from the epididymis, passes through the inguinal canal into the pelvic cavity and courses over the superior aspect of the urinary bladder. |
| Spermatic cord | CT sheath that encloses the vas deferens w/ blood vessels and nerves |
| Ejaculatory duct | duct in which the enlarged region that is formed by vas derens empties out in |
| Ejaculation | contraction of the ejaculatory duct propels the sperm through the prostate to the prostatic urethra |
| Urethra(3 parts) | prostatic urethra empties into →membranous urethra, which empties into→spongy urethra which runs lenth of the penis to the body exterior. |
| Seminal fluid | the liquid medium in which sperm leave the body |
| Semen | sperm plus seminal fluid |
| Seminal vesicles | produce 70% of seminal fluid, lie at the posterior wall of the urinary bladder to the terminus of the ductus deferens/vasdeferens |
| Prostate Gland | encircles the urethra just inferior to the bladder. It secretes a milky fluid into ureth, which plays role in activating sperm. |
| Bulbourethral gland | are tiny, pea-shaped glands inferior to the prostate. They produce thick, clear, alkaline mucus that drains into the membranous urethra, this secretion neutralizes traces of acidic urine in the urethra just prior to ejaculation |
| Penis | part of the external genitalia of the male along w/ the scrotal sac, is the copulatory organ of the male |
| Glans Penis | enlarged tip of the penis |
| Prepuce/foreskin | circular fold of skin that forms from the skin covering the penis that is loosely applied and reflects downward |
| Erection | penis becomes rigid and enlarged so that it may more adequately serve as a penetrating device |
| Corpora cavernosa | paired dorsal cylinders |
| Corpus spongiosum | surrounds the penile urethra |
| Seminiferous tubules | coiled sperm-folding factories |
| Rete testis | another set of tubules at the posterior of the testis that sperm is emptied to |
| Interstitial cells | lie between seminiferous tubules and are softly padded with CT & produce testosterone. |
| Vulva | (external genitalia) consists of the mons pubis, the labia majora and minora, clitoris, urethral and vaginal orifices, hymen, and the greater vestibular glands |
| Mons pubis | rounded fatty eminence overlying the pubic symphysis |
| Labia majora | two elongated, pigmented, haircovered skin folds that run inferiorly & posteriorly from mons and are homologous to the scrotum |
| Labia minora | two smaller hair-free folds that are enclosed by labia majora |
| Vestibule | region enclosed by labia minora that contains many structures-the clitoris, most anteriorly, followed by the urethral orifice and vginal orifice |
| Perineum | diamond shaped region between the anterior end of the labial folds, the ischial tuberosities laterally and the anus posteriorly |
| Clitoris | small protruding structure, homologous to the penis. Composed of highly sensitive erectile tissue |
| Hymen | thin fold of mucous membrane that partially closes the vaginal opening |
| Greater Vestibular Gland | pea-sized, mucus-secreting glands that lubricate the distal end of the vagina during coitus |
| Vagina | serves as a copulatoy organ & birth canal & permits passage of the menstrual flow. |
| Uterus | pear-shaped & is sutuated between the bladder and the rectum |
| Uterine body & fundus | body- major portion of the uterus fundus-superior rounded region above the entrance of the uterine tubes |
| cervix | narrow end of the uterus that is directed inferiorly |
| endometrium | thick mucosal lining of the uterus, has superficial fxnal layer that sloughs off periodically |
| menstruation/menses | sloughing-off process(28 days) in response to cyclic changes in the levels of ovarian hormones in women's blood that is accompanied by bleeding |
| fallopian tubes | (uterine) enter the superolateral region of uterus and extend laterally for about 4 in toward overies in the peritoneal cavity |
| fimbriae | fingerlike extensions of the distal ends of the fallopian tubes that are funnel-shaped. |
| ovulation | event in which the developing egg has reached the stage of maturity and is ejected from the ovary |
| mammary gland | exist w/in breasts in both sexes, but normally have reproduction-related fxn in females. FXN: to produce milk and nourish newborn indant Location: lie anterior to the pectoreal muscles of thorax, attached to them by CT |
| areola | pigmented area that surrounds nipple |
| nipple | centrally protruding structure on breast |
| lobes | internally each mammary gland consists of 15-25 lobes which radiate around nipple and are seperated by fibrous CT and adipose |
| lobules | smaller chambers within each lobe that contain glandular alveoli that produce milk during lactation |
| lactiferous ducts | join to form an expanded storage chamber in which milk passes through |
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