Gametogenesis and fertilisation
- Animated embryology
- Gametogenesis and Fertilisation
- Cleavage and cell differentation
- Organogenesis. Germ layer derivatives.
- Fetal membranes and placentation
- Development of the blood cells, vessels and heart
- Development of the blood circulation
- Pharynx and branchial arches
- Respiratory systen and body cavities
- Digestive system
- Urinary system
- Genital system
- Musculo skeletal system
- Nervous system and special senses
Cell differentiation
Cell differentiation and potency
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| The developmental potential, or potency, of a cell describes the range of different cell types it CAN become. The zygote and its very early descendents are totipotent - these cells have the potential to develop into a complete organism. Totipotency is common in plants, but is uncommon in animals after the 2-4 cell stage. As development proceeds, the developmental potential of individual cells decreases until their fate is determined. |