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Reproduction

Reproduction. Male Reproductive System. Seminal Vesicle. Cowpers Gland. Urethra. Penis. Prostate. Vas Deferens. Epididymus. Testis. Scrotum. Important Glands. The following glands all contribute to semen: Seminal vesicle – secretes fructose for energy

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Reproduction

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  1. Reproduction

  2. Male Reproductive System Seminal Vesicle Cowpers Gland Urethra Penis Prostate Vas Deferens Epididymus Testis Scrotum

  3. Important Glands The following glands all contribute to semen: • Seminal vesicle – secretes fructose for energy • Prostate gland – alkaline buffer, protects from acidic environment of vagina • Cowper’s gland – mucus-rich fluids

  4. Testes • Sperm are produced in seminiferous tubules within the testes • Sperm mature and are stored in the epididymous

  5. Spermatogenesis Three types of cells in testes: • Spermatagonia – produce sperm • Sertoli Cells – influence/nurture developing sperm • Interstitial cells – produce testosterone http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter28/animation__spermatogenesis__quiz_1_.html

  6. Spermatogenesis For each spermatagonium that undergoes meiosis – 4 sperm are produced

  7. Five hormones that control male reproductive function GnRH – released from Hypothalamus, stimulates pituitary to release FSH and LH FSH – stimulates Sertoli cells which then signal sperm production LH – stimulates interstitial cells to produce testosterone Testosterone – male sex hormone

  8. Female Reproductive System Uterus (womb) Ovary Fallopian Tube Fimbriae Vagina

  9. Ovaries • Produce female hormones estrogen and progesterone • Site of egg cell (ova) development and ovulation • Contain cells called follicles that develop into oocytes (immature eggs)

  10. Oogenesis (egg formation) • Follicles make up two kinds of cells: primary oocyte and granulosa cells

  11. Animation: Oogenesis and Ovulation http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter28/animation__maturation_of_the_follicle_and_oocyte.html

  12. Hormones that Control Female Reproductive Function FSH – stimulates follicle development Estrogen – produced by growing follicles (and corpus luteum), high amounts signal ovulation LH – stimulates corpus luteum growth and maintenance Progesterone – produced by corpus luteum. Inhibits further ovulation, maintains uterine lining during pregnancy

  13. Interesting… • Women do not produce new eggs throughout life…unlike sperm production • Women will produce on average of 400 mature eggs between ages 12-50 **new research

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