1 |
The Ultrastructure and Composition of Bovine Spermatozoa.................. |
1 |
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1.1 |
Introduction.................................................................................................. 2 |
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1.2 |
General Features of Bull Spermatozoa......................................................... 2 |
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1.3 |
Sperm Head Structure................................................................................... 4 |
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1.4 |
Sperm Head Composition............................................................................. 9 |
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1.4.1 |
Nucleus.......................................................................................... 9 |
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1.4.2 |
Perinuclear Theca( PT)................................................................ 10 |
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1.4.3 |
The Acrosome and Acrosome Reaction...................................... 17 |
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1.5 |
Tail Structure.............................................................................................. 25 |
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1.6 |
Sperm Tail Composition............................................................................. 29 |
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1.6.1 |
Axoneme...................................................................................... 29 |
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1.6.2 |
Outer Dense Fibers( ODFs) and Connecting Piece.............. |
32 |
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1.6.3 |
Fibrous Sheath( FS)..................................................................... 39 |
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1.6.4 |
Mitochondrial Sheath Arrangement and |
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Composition................................................................................ 44 | ||||
References.............................................................................................................. 53 | ||||
2 |
Bovine Spermatogenesis...................................................................................... 65 |
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2.1 |
Introduction................................................................................................ 66 |
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2.2 |
Sertoli Cell and Blood Testis Barrier.......................................................... 66 |
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2.3 |
The Cycle of the Seminiferous Epithelium................................................. 69 |
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2.4 |
Three Phases of Spermatogenesis( Salient Features).................................. 72 |
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2.5 |
Spermatogenesis and the Cycle of the Bovine Seminiferous |
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Epithelium( Salient Features)..................................................................... 72 | ||||
2.6 |
The Wave of the Seminiferous Epithelium................................................. 73 |
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2.6.1 |
Important Differences between Cycle and Wave................. |
73 |
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2.7 |
Spermatogonial Renewal............................................................................ 75 |
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2.8 |
Development of Cell Types during Spermatogenesis................................. 75 |
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2.9 |
Spermiogenesis( Spermatid Metamorphosis)............................................. 78 |
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2.10 |
Identification of the Stages of the Cycle..................................................... 78 |
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2.11 |
Sperm Head Differentiation........................................................................ 80 |
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2.12 |
Sperm Tail Differentiation.......................................................................... 89 |
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