The Reproductive System: Part A - Next2Eden

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Number ofdivisionsSynapsis ofhomologouschromosomesDaughter cellnumber andgeneticcompositionRoles in the bodyMITOSISOne, consisting of prophase, metaphase,anaphase, and telophase.Does not occur.Two. Each diploid (2n) cell is identical tothe mother cell.For development of multicellular adultfrom zygote. Produces cells for growthand tissue repair. Ensures constancy ofgenetic makeup of all body cells.MEIOSISTwo, each consisting of prophase, metaphase,anaphase, and telophase. DNA replication doesnot occur between the two nuclear divisions.Occurs during mitosis I; tetrads formed,allowing crossovers.Four. Each haploid (n) cell contains half as manychromosomes as the mother cell and isgenetically different from the mother cell.Produces cells for reproduction (gametes).Introduces genetic variability in the gametes andreduces chromosomal number by half so that whenfertilization occurs, the normal diploid chromosomalnumber is restored (in humans, 2n = 46).Copyright © 2010 Pearson Education, Inc. Figure 27.5 (2 of 2)
Spermatogenesis• Spermatic cells give rise to sperm• Mitosis• Spermatogonia form spermatocytes• Meiosis• Spermatocytes form spermatids• Spermiogenesis• Spermatids become spermCopyright © 2010 Pearson Education, Inc.
Page 1 and 2: PowerPoint ® Lecture Slidesprepare
Page 3 and 4: Reproductive System• Sex hormones
Page 6 and 7: PeritoneumSeminalvesicleAmpulla ofd
Page 8 and 9: The Scrotum• Temperature is kept
Page 10 and 11: The Testes• Sperm are conveyed th
Page 12 and 13: Blood vesselsand nervesSpermatic co
Page 14: Seminiferoustubule(c)Interstitial c
Page 17 and 18: The Penis• External anatomy inclu
Page 19 and 20: The Male Duct System• Epididymis
Page 21 and 22: Blood vesselsand nervesSpermatic co
Page 24 and 25: UreterAmpulla of ductus deferensUri
Page 26 and 27: Accessory Glands: Prostate• Encir
Page 28 and 29: UreterAmpulla of ductus deferensUri
Page 30 and 31: Semen• Alkalinity neutralizes the
Page 32 and 33: Male Sexual Response• Erection:
Page 34 and 35: Copyright © 2010 Pearson Education
Page 36 and 37: Meiosis• Gamete formation involve
Page 38 and 39: MEIOSIS IIProphase IIMetaphase IIMe
Page 42 and 43: Copyright © 2010 Pearson Education
Page 44 and 45: Mitosis of Spermatogonia• Begins
Page 46 and 47: Meiosis: Spermatocytes to Spermatid
Page 48 and 49: Spermiogenesis: Spermatids to Sperm
Page 50 and 51: Approximately 24 daysGolgiapparatus
Page 52 and 53: Role of Sustentacular Cells• Tigh
Page 54 and 55: Role of Sustentacular Cells• Tigh
Page 56 and 57: HPG Axis1. Hypothalamus releases go
Page 58 and 59: 1Anteriorpituitary82GnRHVia portalb
Page 60 and 61: Mechanism and Effects of Testostero

The Reproductive System: Part A - Next2Eden

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