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Chapter 16: Reproductive System

Chapter 16: Reproductive System. Gonads = primary sex organs (testes and ovaries) Gametes = sex cells (sperm and ova). Roots: Gonad = seed Albu = white Ductus = carrying away Gen = origin Epi = on top of Corp = body Leut = yellow. treehugger.com.

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Chapter 16: Reproductive System

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  1. Chapter 16: Reproductive System Gonads = primary sex organs (testes and ovaries) Gametes = sex cells (sperm and ova) Roots: Gonad = seed Albu = white Ductus = carrying away Gen = origin Epi = on top of Corp = body Leut = yellow treehugger.com http://player.discoveryeducation.com/index.cfm?guidAssetId=B4AAB725-3A09-4CFF-8F49-2D210491342F&blnFromSearch=1&productcode=US

  2. Male Anatomy Pg 480 Penis = delivers sperm to vagina Testes = manufactures sperm Epididymis = stores immature sperm Seminal vesicle = produces most of fluid carrying sperm Ductus deferens Ductus deferens = delivers sperm to penis Epididymis Bladder Seminal vesicle Prostrate Gland = secretes milky fluid that activates sperm Prostate gland

  3. Spermatogenesis = production of sperm • Germ cells near the outer wall of the seminiferous tubules of the testis differentiate into stem cells called spermatogonia. • Spermatogonia divide by mitosis, and mature into primary spermatocytes. • Each primary spermatocyte undergoes meiosis yielding 4 equal-sized spermatids. • The spermatids migrate toward the lumen (central opening). • Sertoli cells supply nutrients for the spermatids, which mature into motile sperm in the epididymis. http://wps.aw.com/bc_martini_eap_4/40/10469/2680298.cw/content/index.html http://bio1151.nicerweb.com

  4. Female Anatomy Pg 486 Ovary = location of maturing eggs Fallopian Tubes = provide passage of egg to location for fertilization Uterus = the “womb” where the egg developes into a fetus. Vagina = “birth canal”

  5. Oogenesis = production of egg P 485 Follicle = saclike structures with one egg each. Oocyte = unfertilizaed egg FSH = follicle stimulating hormone Ovarian cycle = monthly maturation of a small number of follicles. Produces 2 cells: larger oocyte and smaller polar body. Secondary oocyte grows and bursts from follicle – “ovulation.” Polar body is discarded. http://wps.aw.com/bc_martini_eap_4/40/10469/2680298.cw/content/index.html http://www.como.wa.edu.au

  6. Menstrual Cycle (No Fertilization) Day 1-7 Menstruation (bleeding) Day 8-11 Uterus thickens Day 14 Ovulation Day 18-25 Corpus Luteum fades away Day 26-28 Uterine lining detaches Start over at Day 1 above.

  7. Embryonic Development Early Cleavage Morula Blastocyst Zygote Formation of ectoderm, mesoderm and endoderm Gastrula www.msdellasantina.com

  8. Fetal Development Important Stages in Fetal Development: Week 4: Heart beat.Week 5: Brain waves. Week 8: Responds to touch.Week 9: No legal abortions past this date. Week 16: Hearing. Week 28: Recognizes voices.Week 38: Birth. Development by week. http://www.babycenter.com/fetal-development-images-2-weeks

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