Male Reproductive Anatomy Txt

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Author:
DesLee26
ID:
193610
Filename:
Male Reproductive Anatomy Txt
Updated:
2013-01-20 10:06:48
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BIO 220
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Chapter 46
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  1. a.      External: __
    b.      Internal: __that produce both __ and __, __ that secrete products essential to __, and __that carry __ and __
    • scrotum and penis
    • gonads
    • sperm and reproductive hormones
    • accessory glands
    • sperm movement
    • ducts
    • sperm and glandular secretions
  2. Testes
    •                                                               i.      Male gonads that produce sperm in highly coiled tubes (seminiferous tubules)
    • 1.      Leydig cells, scattered in connective tissue between the tubules, produce testosterone and other androgens
  3.                                                               i.      Most mammals produce sperm properly only when __

    1.      In humans/ other mammals, the __, a fold of the body wall, maintains testis temperature about __C below temp of body
    • testes cooler than normal body temp
    • scrotum
    • 2o
  4.                                                               i.      Testes develop in __ and __into __just before birth (a testis within scrotum= __)
                                                                ii.      In rodents, the testes are __, interrupting __
    Some mammals with proper temp retain testes in __cavity
    • abdominal cavity
    • descend
    • scrotum
    • testicle
    • drawn back into the cavity between breeding seasons
    • sperm maturation
    • ab
  5. a.       Ducts
                                                                  i.      From __ of a testis, the sperm pass into the __
    1.      Humans: __wks for sperm to pass through 6-m-long duct
    2.      During passage through __, what happens? 
    • seminiferous tubules
    • coiled duct of an epididymis
    • 3
    • epididymis
    • the sperm complete maturation and become motile, although they acquire the ability to fertilize an egg only upon exposure to the chemical environment of the female reproductive system
  6.                                                               i.      During ejaculation, the sperm are propelled from each __through a muscular duct, the __
    • epididymis
    • vas deferens
  7. 1.      Each __ extends around and behind  the __, where it joins a duct from the seminal vesicle, forming a short __

    • vas deferens
    • urinary bladder
    • ejaculatory duct
  8. a.      The __ opens into the __, the outlet tube for both the excretory system and the reproductive system
    2. __runs through the penis and opens to the outside at the tip
    • ejaculatory duct
    • urethra
    • Urethra
  9. a.      Accessory Glands
                                                                  i.      Three sets of accessory glands—the __—produce __that combine with sperm to form __, the fluid that is ejaculated
    • seminal vesicles, the prostate glands, and the bulborourethral glands
    • secretions
    • semen
  10.                                                               i.      Two __ contribute about __ of the volume of semen
    1.      The fluid from the seminal vesicles is __
    2.      It contains __, __, __, __, and __
    • seminal vesicles
    • 60%
    • thick, yellowish, and alkaline
    • mucus
    • fructose,
    • a coagulating enzyme,
    • ascorbic acid,
    • and local regulators called prostaglandins
  11.                                                               i.      The __ secretes its products directly into the __through several small ducts
    1.      This fluid is __; it contains __ and __
    • prostate gland
    • urethra
    • thin and milky
    • anticoagulant enzymes
    • citrate
  12. 1.      Source of some of most common medical problems of men over 40
    a.      __enlargement of prostate occurs in more than ½ men and almost all over 70
    b.      __cancer is most common human cancers
    • benign 
    • prostate
  13.                                                               i.      Bulbourethral glands: pair of small glands along the __below the __
    1.      Before ejaculation, they secrete clear __that __ any __ remaining in the __
    2.      __ also carries some __released before __, which is one reason for high failure rate of the withdrawal method of birth control (coitus interruptus)
    • urethra
    • prostate
    • mucus
    • neutralizes
    • acidic urine
    • urethra
    • Bulbourethral fluid
    • sperm
    • ejaculation
  14. a.      Penis
                                                                  i.      Penis contains the __, as well as __
    1.      During sexual arousal, the erectile tissue, which is derived from __, fills with blood from the __
    • urethra
    • three cylinders of spongy erectile tissue
    • modified veins and capillaries
    • arteries
  15.                                                               i.      As this erectile tissue fills, the increasing pressure __, causing it to __
    1.      Resulting erection enables the penis to be inserted into the vagina 
    seals off the veins that drain the penis, causing it to engorge with blood
  16. a.      Alcohol consumption, certain drugs, emotion, and aging= __                                                                                                                                      i.      Individuals with long-term erectile dysfunction, drugs like Viagra promote the __ action of __; the resulting relaxation of __ in the blood vessels of the penis enhances __ for mating, the penis of mammals also contains a bone, the __, which probably further stiffens the penis for mating 
    • temporary inability to achieve erection
    • vasodilating
    • NO
    • smooth muscles
    • blood flow into the erectile
    • baculum
  17.                                                               i.      Main shaft of the penis is covered by __
    1.      The head, or __, of the penis has a much __covering and is more __to stimulation
    a.      The humans __is covered by a fold of skin called the __, or __, which is removed if a male is circumcised
    • thick skin
    • glans
    • thinner
    • sensitive
    • glans
    • prepuce
    • foreskin

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