2. Regenerative and nonregenerative tissues in adult mammals
2. Regenerative and nonregenerative tissues in adult mammals
The tissue triad in skin and nerves Nerve Skin Axon epidermis basement membrane Basement membrane. Myelin sheath Endoneurium dermis Perineurium
The tissue triad in skin and nerves
Skin Defect site The epidermis is a regenerative tissue. After excision, it regenerates spontaneously Reversible injury. No contraction
Skin The epidermis is a regenerative tissue. After excision, it regenerates spontaneously. Reversible injury. No contraction
Skin The dermis is a nonregenerative tissue in the adult. After excision it does not regenerate spontaneously Irreversible injury. Contraction occurs with scar formation
The dermis is a nonregenerative tissue in the adult. After excision, it does not regenerate spontaneously. Irreversible injury. Contraction occurs with scar formation. Skin
Peripheral nerve Compressive force crushed nerve heals spontaneously healing basement membrane b regeneration The myelin sheath is a regenerative tissue Following nerve crushing with myelin disruption, the myelin regenerates spontaneously Reversible injury. No contraction
Peripheral nerve The myelin sheath is a regenerative tissue. Following nerve crushing with myelin disruption, the myelin regenerates spontaneously. Reversible injury. No contraction. crushed nerve heals spontaneously by regeneration