human reproduction system

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Biology, human reproduction system. Not mine, all credits to my teacher Ms.Ruth.

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human reproduction system

  1. 1. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece Lectures by Chris Romero GENERATIF REPRODUCTION IN ANIMALS
  2. 2. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 1. Animal Gametogenesis SPERMATOGENESIS • Occurs in sperm producing organ called testis by special cells called spermatogonia (sperm parent cell).
  3. 3. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Spermatogonia then experience mitosis to form primary spermatocyte. 1 primary spermatocyte will experience meiosis I to form 2 secondary spermatocytes. Each secondary spermatocytes experiences meiosis II to form 4 spermatid cells. Spermatid then will differentiate in to sperm cell.
  4. 4. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 1. Animal Gametogenesis OOGENESIS • Occurs in the ovarium
  5. 5. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Oogenesis started by mitosis from oogonium to form prymary oocyte. Prymary oocyte then will divide itself in meiosis I to form 2 cell which are different in size. The larger cell is called secondary oocyte and the smaller cells is called polar body I. Oocytes then experience meiosis II to form 2 different size cells again. The larger cell is called ootid and the smaller cels is called polar body II. Polar body I will experience meiosis II to form polar body II. Ootid will develop become temporary ovum while 3 polar body II degenerated.
  6. 6. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Internal Fertilization, occurs inside the female body. External Fertilization, occurs outside the female body. In external fertilization, male and female gametes will be produced and excreted in large numbers to the environment (ussually in the water or wet condition) Fertilization
  7. 7. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece Lectures by Chris Romero The Human Reproductive System
  8. 8. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
  9. 9. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings • Testis – male gonads • Epididymis - structure in the male reproductive system in which sperm fully mature and are stored – Sperm is produced in the seminiferous tubules • vas deferens - tube that carries sperm from the epididymis to the urethra • Prostate gland – large gland that secretes semen directly into the urethra • Urethra - tube through which urine and semen are released from the body • Penis - external male reproductive organ that connects the urethra to the outside of the body
  10. 10. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Female Reproductive System
  11. 11. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings • Ovaries – where meiosis occurs • Fallopian tubes (oviduct) – where fertilization occurs; after ovulation the egg moves through the oviduct to the uterus. • Uterus – where the blastula stage of the embryo will implant and develop during the 9 month gestation. • Vagina – birth canal. • Cervix – mouth of the uterus. • Endometrium – lining of the uterus. • In addition to producing eggs, the female reproductive system prepares the female’s body to nourish a developing embryo.
  12. 12. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings • Follicle - cluster of cells surrounding a single egg in the human female reproductive system • Ovulation - process in which an egg is released from the ovary
  13. 13. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Female Reproductive System
  14. 14. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology, Seventh Edition Neil Campbell and Jane Reece Lectures by Chris Romero Fertilization and Embryo Development
  15. 15. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Fertilization and Development • Monoploid (n) Egg is Released • Fertilization – Usually occurs in the upper region of the fallopian tube Zygote – a fertilized egg • Cleavage – rapid mitotic divisions which occurs after fertilization Zygote  Morula  Blastula • Implantation – Usually occurs 6 to 7 days after fertilization. Blastula  undergoes gastrulation  Gastrula • Gastrulation - process of cell migration by which a third layer of cells is formed within the cavity of a blastocyst
  16. 16. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
  17. 17. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
  18. 18. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
  19. 19. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
  20. 20. Home Work: Please looking for 5 deseases in the reproductive system 
  21. 21. Thank You Guys 

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