Download - Organismal Development Part 3
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Organismal Development Part 3Male Animals
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.MitochondrionIntermembrane spaceOuter membraneInner membraneCristaeMatrix100 nmMitochondrialDNAFreeribosomes in themitochondrialmatrix
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Protogynous
GYN means female (think gynecologist)Limited number of males present
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ProtoandrousANDRO refers to males Limited number of females present
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External Fertilization
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Phermones
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Earthworms are hermaphrodites
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Protogynous(Male is blue)
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Internal Fertilization required
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SpermatogenesisSpermatogoniumPrimary spermatocyte(in prophase of meiosis I)Mitotic division, producinglarge numbers of spermatogoniaMeiosis I completedDifferentiation and onset of meiosis ISecondary spermatocyteMeiosis IIEarlyspermatidsSpermatids(at two stages ofdifferentiation)DifferentiationSperm cellsNeckHeadMidpieceTailPlasma membraneMitochondriaAcrosomeNucleusSertoli cellnucleusLumen ofSeminiferous tubuleCross sectionof seminiferoustubuleTestisEpididymisSeminiferous tubule
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Secondary Sexual Characteristics
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