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1-Reproductive-System-1.pptxheevhndhagdw
- 1. REPRODUCTIVE SYSTEM Unit 6 –Lesson 1
- 2. What is reproduction? •Procreation •Produceoffspring •Specialized organs •Diff. bet. male and female
- 3.
- 4. Male Reproductive Organs •Produceand release sperm •Sperm = male gamete •6 main parts
- 6. Male Reproductive Organs •Testicle •Coiledtubules •Produce sperm •Enveloped by scrotum •Epididymis •Store sperm •2 – 4 days
- 7. Male Reproductive Organs •SeminalVesicle •Produce semen •Nourishment •Vas deferens •Receives sperm •Semen from SV
- 8. Male Reproductive Organs •Urethra •Channelfor urine and sperm •Has a valve •Prevent mixing
- 9. Male Reproductive Organs •Penis •Externalorgan •Releases sperm •Ejaculation •Initially soft, can stiffen due to increased blood flow.
- 10. Female Reproductive Organs •Produceegg cells, incubates embryos •Egg cell = female gamete •6 main parts
- 12. Female Reproductive Organs •Ovaries •2small organs •Produce egg cells •Eggs mature on puberty •Happens every 28 days
- 13. Female Reproductive Organs •FallopianTube •2 thin tubes •Store egg •Passageway •Sperm to egg •Egg to uterus
- 14. Female Reproductive Organs •Uterus •Womb •Carriesthe fetus until birth •Flexible chamber
- 15. Female Reproductive Organs •Cervix •Narrow,inch-long passage
- 16. Female Reproductive Organs •Vagina •Birthcanal •Elastic lining
- 17. Female Reproductive Organs •Vulva •Externalorgan •Protects the vagina from infections and infestations
- 18. Assignment In preparation forour next topic, answer the following questions: •What are the different stages of a developing embryo? •Give two diseases of the reproductive system, and give a brief description of each.
- 19.
- 20. Menstruation •Start bet. 11and 15 •Monthly shedding of blood •Lining of uterus (endometrium) •Thickens for carriage •Pregnancy doesn’t happen •21 – 35 days per cycle
- 21. Menstrual Cycle •Four phases •MenstrualPhase •Follicular Phase •Ovulation •Luteal Phase
- 23. Menstrual Cycle •Menstrual Phase •Endometrium breaksdown •Discharged from uterus •Day 1 - 5
- 24. Menstrual Cycle •Follicular Phase •Folliclematures •Follicle = sacs containing eggs •Endometrium is rebuilt •Day 6 - 13
- 25. Menstrual Cycle •Ovulation Phase •Ovumis released •Endometrium thickens •Day 14
- 26.
- 27.
- 28. Stages of EmbryonicDevelopment •Fertilization •Fusion of egg and sperm •Produces a zygote •Later becomes the fetus •5 main stages
- 30. Stages of EmbryonicDevelopment •Fertilization •Cleavage •Gastrulation •Organogenesis •Specialization and Growth
- 31. Fertilization •Sperm and eggunite •Fusion of DNA material •Start of development •As zygote
- 32. Cleavage •Zygote travels touterus •Absorbs nutrients along the way •Divides as it travels •Becomes a blastocyst
- 33. Gastrulation •Blastocyst adheres to uterus •Implantation •Calledan embryo •Form germ layers •Organ regions
- 34. Embryo •Initial development •25 daysafter fertilization •Connected via umbilical cord •Get nutrients from placenta
- 36.
- 37. Specialization and Growth •Organsdevelop unique structures •Enlarge in size •Known as fetus
- 38. Fetus •2 months afterfertilization •4 months •Moves around •7 months •Eyelashes and eyelids
- 40.
- 41.
- 42. STDs •Sexually Transmitted Diseases •Duringsexual contact •Avoid by sexual fidelity
- 43. Chlamydia •Transmission •Sexual contact •Infection asnewborns •Chlamydia trachomatis
- 44.
- 45. Chlamydia •Female •Cervix, rectum orthroat •Male •Urethra, rectum or throat •Newborn •Eye and lung infection
- 48.
- 49. Genital Herpes •Tender, painfulblisters •Swollen glands, fever •Newborns •Minor symptoms •Brain damage •death
- 50. Genital Herpes •Transmission •Contact withblisters / viruses •Infection as newborns
- 52. Genital Herpes •Treatment •No sexualcontact •Viruses are shed continuously •No cure
- 53.
- 54. Gonorrhea •Transmission •Sexual contact •Infection asnewborns •Neisseria gonorrhoeae
- 56.
- 57. Syphilis •4 stages •Painless sores •Rashes,fever, hair loss, swollen glands •Latent
- 58. Syphilis •Spasms, Numbness, Dementia, Blindness,Death •Newborns •Damaged eyes, skin, liver and bones
- 59. Syphilis •Transmission •Sexual contact duringfirst 2 phases •Infection as newborns
- 62. Syphilis •Treatment •Antibiotics in thefirst 2 stages •Hard to cure at later stages •No sexual activity