By David Phillips (Auth.)
ISBN-10: 012553650X
ISBN-13: 9780125536509
ISBN-10: 0323161197
ISBN-13: 9780323161190
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Extra info for Spermiogenesis
Example text
From B. ,, Academic Press, New York, 1970. Courtesy of Dr. D. W. Fawcett. Fig. 24. 30 Neck region of a Chinese hamster spermatid. THE A C R O S O M E ÎpQpfi 1*^Ι^^ονΦ ^^! ΨΡ'Ρ 1 fjÉ|3ΑΑ^^^*νΦ Ê i^HΛ-t-SI kpr W ■'■; *! \ ^ s 31 ; MIDPIEC E haveaccessorytubule si npositionsanalogoust oth e positio no fdens efibers (Fig . I nth eligh tmi - densefibers; others,suc ha sma n(98) ,rabbi t(157), croscope ,i tappearsthickertha nmor eposteriorregions andopossum(104), hav esmall,densefibers. I nth etransversesectio no fmammaliansperm , therear esimilarities;th edens efibers associatedwit h flagellar doublet sone ,five, an dsi xar elarge rtha n themidpiecei sseent ocontainth echaracteristi c9 + 2 flagellum, nin edenseo rcoarsefibers, an dth esausage- theother sa tmos tlevels ,an ddens efibers numbers threean deigh tterminatemostanteriorlyi nal lspecies.
From B. ,, Academic Press, New York, 1970. Courtesy of Dr. D. W. Fawcett. Fig. 24. 30 Neck region of a Chinese hamster spermatid. THE A C R O S O M E ÎpQpfi 1*^Ι^^ονΦ ^^! ΨΡ'Ρ 1 fjÉ|3ΑΑ^^^*νΦ Ê i^HΛ-t-SI kpr W ■'■; *! \ ^ s 31 ; MIDPIEC E haveaccessorytubule si npositionsanalogoust oth e positio no fdens efibers (Fig . I nth eligh tmi - densefibers; others,suc ha sma n(98) ,rabbi t(157), croscope ,i tappearsthickertha nmor eposteriorregions andopossum(104), hav esmall,densefibers. I nth etransversesectio no fmammaliansperm , therear esimilarities;th edens efibers associatedwit h flagellar doublet sone ,five, an dsi xar elarge rtha n themidpiecei sseent ocontainth echaracteristi c9 + 2 flagellum, nin edenseo rcoarsefibers, an dth esausage- theother sa tmos tlevels ,an ddens efibers numbers threean deigh tterminatemostanteriorlyi nal lspecies.
Theannulu si sbelievedt oderiv ei npar tfro ma largefibrouselectron-dens estructure,termedth echro matoidbod y(44). I tha sbee n suggeste dtha tth ematerial tha tcomposesth echromatoidbod yi so fnuclearorigi nan dpassesthroughnu clearpore s(37, 85), o rtha tth echromatoidbod y arisesfro mcytoplasmic-dens ematerial tha taggregates inassociationwit hmitochondria(46). Som eevidence support sth eide atha tth echromatoidbod ycontain s RNA (85) whil eothe revidencesuggeststha ti tdoe s not (41). Cell sa t thelowe rlef tan drigh tar etransecteda tth e levelo fth eprincipal piece.
Spermiogenesis by David Phillips (Auth.)
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