Ch18 Pattern Formation – Regeneration Types of Regeneration: 1.Stem Cells (undifferentiated)...
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Transcript of Ch18 Pattern Formation – Regeneration Types of Regeneration: 1.Stem Cells (undifferentiated)...
Ch18 Pattern Formation – Regeneration
Types of Regeneration:
1. Stem Cells (undifferentiated)
2. Morphallaxis
3. Epimorphosis
4. Compensatory Regeneration (differentiated)
Pattern FormationRegeneration
Epimorphosis
RegenerationEpimorphosis
Limb regeneration - Blastema
What is necessary for limb regeneration?Denerve then amputated ?
Amputation add NGF ?
Nerve transplants in animals which normally lack regeneration:
Newborn Opposum1. Hindlimb Amputation ?2. Supplemental nerve tissue ?
Epimorphosis
Hydra freshwater cnidarian Morphallaxis
Hydra – regeneration gradientsHead Activator vs. Head Inhibitor both from Hypostome
Budding - level of HA at gastric bud
Role of nerves
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head gastric gastric foot
HAHI
Compensatory Regeneration