Physiology of Integumentary System - Repair Flashcards
1
Q
tissue is made up of:
A
cells + matrix
2
Q
matrix
A
- aka extracellular material
- made up of ground substance (extracellular fluid), protein, collagen fibers
3
Q
1st step of tissue repair
A
- blood platelets (from broken blood vessel) accumulate in area to form clot
- secrete mesh-like substance around clot to prevent blood loss
4
Q
2nd step of tissue repair
A
- mast cells release histamine (chemical)
- -> dilates blood vessels to bring increased blood + nutrients to area
- -> initiates local inflammatory response (signals cells to remove foreign pathogens)
5
Q
3rd step of tissue repair
A
macrophages (type of white bc) engulf and destroy disease causing pathogens
6
Q
4th step of tissue repair
A
- fibroblasts secrete new collagen in shape of old tissue
- -> forms framework supporting tissue matrix until new cells fully develop
7
Q
5th step of tissue repair
A
- remodeling: tissue matures, cells begin retaking their original functions
- if would too deep, scar (overgrowth of fibrous connective tissue, can’t be replaced fully by og tissue) will form
8
Q
1st degree burns
A
- least severe
- superficial, only damage epidermis
- burned area becomes dry, red, painful (no blisters)
9
Q
2nd degree burns
A
- aka partial thickness burns
- damage to epidermis and part of dermis
- burned area becomes red, blistered, painful swelling (more sensory organs in dermis –> more painful)
10
Q
3rd degree burns
A
- aka full thickness burns
- damage epidermis + entire dermis, sometimes part of subcutaneous tissue
- typically, burned area has white or charred appearance
- extremely painful
11
Q
4th degree burns
A
- damage all the way to tissue below hypodermis (e.g. muscle/bone)
- nerve endings destroyed –> no sensation in area
12
Q
skin graft
A
- necessary if skin too damaged or burn has large surface area
- decreases recovery time and prevents infection
