Tissue Repair After Injury
Learning Objective
I can describe and explain the process of tissue repair after an injury.
Key Concepts
When salamanders lose a limb, skin cells quickly move across the wound to form a new layer called the wound epidermis.
The process of dedifferentiation reverts cells from fully developed limb tissues back into earlier, less specialized progenitor cells.
The blastema, made of recycled cells, is a structure that grows new cells and organizes them into muscle, bone, skin, and nerve tissue to form a functional limb.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. What is the first thing that happens when a salamander loses a limb?
2. What is the wound epidermis, and what is its function in tissue repair?
3. Define 'dedifferentiation' as it relates to tissue repair in salamanders.
...and 4 more questions
Educational Video
How do animals regrow their limbs? And why can't humans do it? - Jessica Whited
TED-Ed