nerve tissues consists of

• neuroglia

  • insulate, support, & protect neurons

• neurons

  • stimulated by nerve impulse

  • broken down into cell body & dendrites

  • myelin sheath

injury to nerves

• nerves are fragile & can be damaged by pressure, stretching, or cutting

• injury to a nerve can stop signals to & from brain (numbness, no muscle mvmnt, etc)

• nerves do not heal quickly (paraplegic)

soft-tissue injuries

• classified as open or closed

abrasions

• aka scrapes

• keep it clean

• occur when several layers of skin are torn loose or totally removed

• can be more painful than deeper cuts bc scraping exposes millions of nerve endings

laceration

• a tear/cut in the skin resulting from an injury

• blood squirting in heartbeat rhythm = arterial

• pack wound & apply pressure

avulsion

• skin layers torn off completely or a flap of skin only remains & may caused considerable bleeding

puncture wound

• caused by sharp & pointed objects that penetrate skin

• diff to clean

• do not remove object by yourself

hematomas

• pooling of blood beneath skin

• internal bleeding

• usually result of contusion

redness beyond wound site, swelling, & increase in temp = infection signs

body’s response to injury

• inflammation

• regeneration

• cellular dedifferentiation

• transdifferation

• tissue remodeling