kuliah Biologi Reproduktif
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Figure 26-3a: Sexual development in the human embryo
Figure 26-3b: Sexual development in the human embryo
TestisEpididymisVas deferensSeminal vesicleProstateBulbourethralEjaculatory ductUrethraPenis
Sekret Vesikula Seminalis fruktosa (sumber energi spermatozoa) untuk motilitas dan Flavin (forensik) mendeteksi adanya semenSekret Glandula Prostata asam sitrat (proses likuifikasi ejakulat dan memelihara keseimbangan osmotik plasma semen), spermin,spermidin, IgA dan IgG (menstimulasi kehidupan spermatozoa)Kelenjar Bulbouretra ( Kelenjar Cowperi) dan Kelenjar Littre ( kelenjar uretra) : membasahi bagian pangkal uretra.
Seminiferous tubules Spermatogonium Spermatids Spermatocytes Spermatozoa Sertoli cellsInterstitial tissue Leydig cells Capillaries
HeadAcrosome:Nucleus:MidpieceCentrioles:Mitochondria:Tail: flagellumMicrotubules:Figure 26-10: Sperm structure
Fase proliferasi : saat pubertas sel primordial mitosis menghasilkan spermatogoniaFase Pertumbuhan : spermatogonia menjadi spermatocytus primariusFase Pematangan : spermatocyt primer bermeiosis I menjadi secunder, bermeiosis ke II menjadi spermatid kromosom (haploid) 23, XY atau XXFase Transformasi : spermatid menjadi spermatozoa Spermiogenesis
Figure 26-5: Gametogenesis
Hypothalamus: pulse generatorGonadotropin releasing H(GnRH)Anterior PituitaryLutenizing H (LH)Follicle stimulating H (FSH)Ovary: progesteroneEstrogen, inhibinTestis: testosterone
GnRH LH Leydig cells testosterone sex charact.GnRH FSH Sertoli cells spermatoctye maturationInhibin feedback FSH, testosterone short & long loops
OvaryFallopian tube FimbriaeUterus Cervix EndometriumVaginaClitorisLabia
Figure 26-12d: ANATOMY SUMMARY: Female Reproduction
Follicular phaseEgg maturesOvulationEgg releasedLuteal phaseCorpus luteumEndometrium Prep for blastocystNo PregnancyMensesFigure 26-13: The menstrual cycle
Figure 26-14a,b: Hormonal control of the menstrual cycle
Dasar Biologi Sel 1 - KBK 2006*Oosit primer melakukan meiosis I dan terhenti pada Profase I fase diploten dan akan dilanjutkan pada saat pubertasPada saat ovulasi, oosit II dalam fase metatase II dan baru dilanjutkan bila terjadi fertilisasi
Dasar Biologi Sel 1 - KBK 2006*
Figure 26-14c, d: Hormonal control of the menstrual cycle
Figure 26-15: The erection reflex
Increase production of sex hormonesMaturation of reproductive organs & gamete production20 sexual characteristicsMales: pubic hair, beard, deep voice, "wedge" body form & muscle massFemales: menarche, pubic hair, breasts & "pear shape" body form
Menopause: Female "Change-of Life" Ovaries responding to GnRH Levels of estrogen & progesterone producedCease egg development"Hot flashes" , osteoporosis risk(hormone replacement debate)"Andropause" (?): Male changes are gradual Sex hormones: muscle mass, libido, erections
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