Histology Flashcards
Types of tissues
Epithelial
Connective
Muscular
Nervous
Epithelial
Protective boundary (lining) of transport of substance
Connective
Network as support for tissues
Muscular
Responsible for contraction
-heart
-biceps
Nervous
Transmits signals form peripheral nervous system to central nervous system
Fibrosis
presence of excessive fibrous connective tissue in an organ
Cystic fibrosis
genetic disorder that causes scarring of the pancreas
Pulmonary Fibrosis
scarring of the lungs resulting in shortness of breath
Injuries to tissue that result from heat, electricity, radiation or chemicals
Burns
Classification of Burns
Burn Depth
Burn Severity
Symptoms of Burn
Doctors classify burns according to strict. The definitions classify the burn’s depth and the extent of tissue damage
Burn Depth
Burns are classified as minor, moderate, or severe. The severity determines how they are predicted to heal and whether complications are likely. This determine the severity of the burn by its depth and by the percentage of the body surface that has partial-thickness or full-thickness burns.
Burn severity
Vary with the burn’s depth
Symptoms of burn
Burn depth
Superficial burns
Partial-thickness burns
Full-thickness burns
Burn Severity
Minor burns
Moderate and severe burns
Symptoms
Superficial burns
Partial-thickness burns
Full-thickness burns
Type of burn depth
-burns are the most shallow (also called first-degree burns)
-they affect only the top layer of the skin (epidermis)
Superficial burns
Type of Burn Depth
- also called second degree burns
- middle layer of the skin (dermis)
- involving both the superficial and the deep parts of the dermis
Partial-thickness burns
Type of burn depth
- also called third-degree burns
- involve all three layers (epidermis, dermis, and fat layers)
- the sweat glands, hair follicles, and nerve endings are destroyed as well.
Full-thickness burns
Type of burn severity
- all superficial burns as well as partial thickness burns that involve less than 10 percent of the body surface
Minor burns
Type of burn severity
- burns involving the hands, feet, face, or genitals, partial-thickness burns involving more than 10 percent of the body surface area, and all full thickness burns involving more than 1 percent of the body
Moderate and severe burns
Type of symptoms
- red, swollen, and painful.
- the burned area whitens (blanches) when lightly touched but does not develop blisters
Superficial burns
Type of symptoms
-pink or red, swollen and extremely painful
-within 24 hours (often shortly after the burn), blisters usually develop that may ooze a clear fluid.
-the burned area may blanch when touched
Partial-thickness burns
Type of symptoms
- usually are not painful because the nerves that sense pain have been destroyed
- the skin becomes leathery and may be white, black, or bright red
- the burned area does not blanch when touched
- hairs can easily be pulled from their roots without pain
Full thickness burns
