1 / 40

Reproduction

Reproduction. Humans. Sexual Reproduction Involves _____ parents Increases genetic _________. REVIEW. Gametogenesis is the formation of male and female ________________. Female = ____________ Male = ______________ Occurs by the process of __________ Reduces chromosome # by ___________.

cress
Download Presentation

Reproduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reproduction

  2. Humans • Sexual Reproduction • Involves _____ parents • Increases genetic _________

  3. REVIEW • Gametogenesis is the formation of male and female ________________. • Female = ____________ • Male = ______________ • Occurs by the process of __________ • Reduces chromosome # by ___________

  4. Male Reproductive System

  5. Male Reproductive System • Testes • Male gonads • Makes sperm • Contained in scrotum

  6. Male Reproductive System • Vas Deferens • Carries sperm from testes to urethra • When this tube is cut, it is called a vasectomy

  7. Male Reproductive System • Prostate Gland • Secretes a fluid that nourishes sperm and produces semen • Seminal Vesicle makes fluid that contains proteins, enzymes, fructose, mucus, vitamin C and other chemicals.

  8. Male Reproductive System • Penis • Deposits sperm into female reproductive tract

  9. Female Reproductive System

  10. Female Reproductive System • Ovaries • Female gonads • Make eggs (contained in follicles) • Once a woman stops making viable eggs, she is no longer fertile and has gone through menopause • Fun Fact: A girl is born with about 400,000 immature ova already formed in the ovaries. Only about 400 will mature into eggs in her lifetime.

  11. Female Reproductive System • Fallopian Tubes/Oviduct • Egg is pulled into oviduct by cilia • Site of fertilization

  12. Female Reproductive System • Uterus (womb) • Muscular organ where fertilized egg implants and develops • Cervix is opening to uterus • It dilates during birth

  13. Female Reproductive System • Vagina • Passageway for sperm • Birth canal

  14. Female Reproductive System • Menstrual Cycle • Begins between ages of 10-14 • A mature egg is released from follicle in ovary every 27-30 days

  15. Female Reproductive System • Menstrual Cycle (continued) • 4 Stages • 1. Follicle Stage • Egg matures in ovary • 2.Ovulation • Follicle bursts & egg is released • 3. Corpus Luteum Stage • Hormones cause progesterone to be made, which stimulates thickening of uterine wall • 4. Menstruation • Shedding of uterine wall (if fertilized egg is not present)

  16. Fertilization • Egg and Sperm meet in oviduct • Zygote is formed • Zygote undergoes mitosis (cleavage) and becomes embryo

  17. Development • 1. Zygote • 7. Blastula • 11. Gastrula

  18. Gastrula Ectoderm-Skin and Nervous System Mesoderm-Muscles and Heart Endoderm-Digestive Tract and Respiratory System

  19. Development • Twins • Identical Twins: • 1 egg and 1 sperm • Fertilized egg splits • Fraternal Twins: • 2 eggs and 2 sperm

  20. Development • Once the zygote travels to the uterus, it implants itself in the uterine wall. • The placenta provides an exchange of materials between the mother and embryo. • Placenta is connected to embryo by umbilical cord

  21. Development

  22. External Fertilization/Development • In fish, external fertilization and development

  23. Internal Fertilization/External Development • Frogs and Birds

  24. Chicken Egg Anatomy

  25. Developing Chicken Embryo

  26. Asexual Reproduction • Mitosis produces exact copies • Involves 1 “parent”

  27. Types of Asexual Reproduction • Binary Fission • Budding • Sporulation • Regeneration • Parthenogenisis • Vegetative Propogation

  28. Binary Fission

  29. Budding

  30. Sporulation

  31. Regeneration

  32. Parthenogenesis • Certain organisms can reproduce without fertilization • Ex. Bees, worms, snails, etc.

  33. Vegetative Propagation • Plants (aka vegetables) can reproduce new offspring without fertilization • Runners • Bulbs • Tubers • Cuttings • Grafting

  34. Runners • Stems grow out of the existing stems

  35. Bulbs • Bulbous root is underground and stores food and sprouts a new plant

  36. Tubers • Underground root that has stored starch which is used to feed new growths

  37. Cuttings and Grafting • Cuttings and graftings are “artificial” • Cuttings use a part of the root, stem or leaf to re-grow a new plant. • Graftings take a cutting from one plant and attaches it to a different plant

  38. Cuttings

  39. Grafting

  40. Grafting

More Related