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reproduction - Coggle Diagram
reproduction
human early embryogenesis and stages 
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gastrula
formation of three germ layers: ectoderm, mesoderm, endoderm
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tissues and organs derived from germ layers
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ectoderm
nervous system (brain, spinal cord)
sensory organs (eyes, ears)
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gametogenesis
oogenesis
process involving oogonia, primary oocytes, secondary oocytes, and ovum
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spermatogenesis
process involving spermatogonia, spermatocytes, spermatids, and spermatozoa
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mature gametes
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fertilization
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metamorphosis
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types of reproduction
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