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Primary sex organs (seeds); Testies in males and Ovaries in females.
Gonads
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Gonads secrete hormones as well as?
- 1. Gametes (sex cells); Sperm - males gametes and
- ova (eggs) - female gametes.
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Primary reproductive organ of the male?
Testes
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Site of testosterone production.
Testes
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Tubular storage site for sperm; hugs the lateral aspect of the testes.
Epididymis
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Passageway from the epididymis to the ejaculatory duct
Ductus deferens
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Conveys both sperm and urine down the length of the penis.
Urethra
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Produces more than half of the seminal fluid.
Seminal vesicles
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Surrounds the urethra at the base of the bladder; produces milky fluid.
Prostate
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Produces a lubricating mucus that cleanses the urethra.
Bulbourethral glands
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A milky white; somewhat stick mixture of sperm and accessory gland
secretions
Semen
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Semen is an alkaline in order to help....
neutralize the acidic environment of the female vagina to protect delicate sperm.
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An antibiotic chemical that destroys certain bacteria
Seminalplasmin
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How much sperm is in 1 ml of semen?
50 to 150 million sperm
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Two homeostatic imbalances are?
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Organ that delivers semen to the female
reproductive tract.
Penis
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External skin sac that houses the testes.
Scrotum
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The production of sperm cells that being at puberty and continues throughout life in which occurs in the seminiferous tubules
Spermatogenesis
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A stimulating hormone (FSH) that modifies spematongonia division
Follicle
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Spermatogonia (stem cells) undergo rapid mitosis in order to produce....
more stem cells before puberty
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What are the two cells that are produced in
spermatogonia division?
- A stem cell, called type A daughter cell.
- A primary spermatocyte, called type B daughter cell.
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Primary spermatocytes undergo what?
Meiosis.
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One primary spermatocyte produces...
four haploid spermatids
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23 chromosomes (half as much material as other body cells
Haploid spermatids
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A union of sperm (23 chromosomes) with an egg (23 chromosomes) creates what?
A zygote, diploid; 2n or 46 chromosomes.
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Late spermatids are produced with what three distinct regions?
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What results after maturing of spermatids?
Sperm cells
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Spermatogenesis takes how long?
64 to 72 days
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The mature sperm cells are the only what?
Human flagellated cell
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What part of the mature sperm cell is wrapped by mitochondria for ATP generation?
Midpiece
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What contains DNA that breaks down and releases enzymes to help the sperm penetrate an egg?
The head of a mature sperm cell.
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Acrosome is what?
"Helmet on the nucleus, similar to a large lysosome
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During puberty, what is produced in order to activate the interstitial cells?
Luteinizing hormone (LH)
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The most important hormone of the testes is what?
Testosterone
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Testosterone causes what four secondary sex characteristics?
- Deepening of voice
- Increased hair growth
- Enlargement of skeletal muscles
- Thickening of bones
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What are the three functions of testosterone?
- Stimulates reproductive organ development
- Underlies sex drive
- Causes secondary sex characteristics
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List the four organs that contribute to the formation of semen.
- Bublbourethral glands
- Prostate
- Seminal vesicles
- Testes
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Cuff of skin encircling the glans penis
Prepuce
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Connective tissue sheath enclosing the ductus deferens, blood vessels, and nerves.
Spermatic cord
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Trace the pathway of sperm from the testis to the urethra. List these terms in proper order; rete testis, epididymis, seminiferous tubule, ductus deferens.
Seminiferous tubule -> Rete testis -> Epididymis -> Ductus deferens
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How do the scrotal muscles help maintain temperature homeostasis of the testes?
When the body temperature (or external temperature) is high the scrotum muscles relax allowing the testes to hang lower and farther away from the warmth of the body wall. This causes testicular temperature to drop when the external temperature is cold, the scrotal muscles contract to draw the testes closer to the body wall.
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Spongy tissue that is engorged with blood during erection
Corpus spongionism, or erectile tissue, in the penis
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Portion of the duct system that also serves the urinary system.
Urethra
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Structure that provides the ideal temperature conditions for sperm formation.
Scrotum
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Structure removed in circumcision.
Prepuce
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Gland whose secretions contain sugar to nourish sperm.
Seminal vesicles
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Structure cut or cauterized during a vasectomy.
Ductus deferens
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The DNA containing area of a sperm.
Nucleus
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The enzyme-containing sac that aids sperm penetration of the egg
Acrosome
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Metabolically active organelles that provide ATP to energize sperm movement
Mitochondria
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Word Bank: Bulbourethral gland, Ductus
deferens, Glans penis, Ejaculatory duct, Epididymis, Erectile tissue, Prepuce, Prostate, Urethra, Scrotum, Seminal vesicle, Testis.
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Word Bank: Acrosome, Axial filament of tail, Head, Midpiece, Mitochondria, Neck, Nucleus, Tail.
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Produces sex cells.
Meiosis
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Growth/developement for zygotes.
Mitosis
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Final product is two daughter cells, each with 46 chromosomes.
Mitosis
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Final product is four daughter cells, each with 23 chromosomes.
Meiosis
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Occurs in all body tissues.
Mitosis
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Occurs only in the gonads
Meiosis
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