Organismal Development Part 3

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Organismal Development Part 3

• Male Animals

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Mitochondrion
Intermembrane space
Outer membrane
Free ribosomes in the mitochondrial matrix
Inner membrane
Cristae
Matrix
Mitochondrial DNA
100 nm
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Phermones
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Earthworms are hermaphrodites
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Protogynous(Male is blue)
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External Fertilization
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Internal Fertilization required
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Spermatogenesis
Epididymis
Seminiferous tubule
Testis
Cross section of seminiferous tubule
Spermatogonium
Sertoli cell nucleus
Mitotic division, producing large numbers of
spermatogonia
Differentiation and onset of meiosis I
Primary spermatocyte (in prophase of meiosis I)
Meiosis I completed
Secondary spermatocyte
Meiosis II
Lumen of Seminiferous tubule
Early spermatids
Spermatids (at two stages of differentiation)
Differentiation
Neck
Sperm cells
Tail
Midpiece
Head
Plasma membrane
Acrosome
Nucleus
Mitochondria
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Secondary Sexual Characteristics
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