Study Set Content:
- Regulation of body temperature is important because the rate of chemical reactions within the body can be increased or decreased by changes in body temperature.
- Regulation of body temperature is important because the rate of chemical reactions within the body can be increased or decreased by changes in body temperature.
- tend to raise body temperature.
Exercise, fever, and an increase in environmental temperature
In order to maintain homeostasis, the body must rid itself of
excess heat
- enable more blood to flow within the skin, thus causing heat to dissipate from the body.
Blood vessels in the dermis dilate
- also assists in loss of heat through evaporative cooling.
Sweat
heat can be conserved by the
- constriction of dermal blood vessels, which reduces blood flow to the skin.
The integumentary system plays a minor role in excretion, the removal of waste products from the body.
The integumentary system plays a minor role in excretion, the removal of waste products from the body.
a bluish color to the skin caused by decreased blood O2 content, is an indication of impaired circulatory or respiratory function.
Cyanosis
- A yellowish skin color, called , can occur when the liver is damaged by disease, such as viral hepatitis.
jaundice
- Is injury to a tissue caused by heat, cold, friction, chemicals, electricity, or radiation.
burn
Partial-thickness burns are classified as
- first-degree and second-degree.
A full-thickness burn is a
3rd degree burn
- involves only the epidermis and is red and painful.
- Slight edema, or swelling, may be present.
- They can be caused by sunburn or brief exposure to very hot or very cold objects, and they heal without scarring in about a week.
A first-degree (superficial) burn
- burns damage the complete epidermis and dermis.
Third-Degree Burn
is usually painless because sensory receptors in the epidermis and dermis have been destroyed.
3rd degree burns
- burns damage both the epidermis and the dermis.
- IF dermal damage is minimal, symptoms include redness, pain, edema, and blisters.
- Healing takes about 2 weeks, and no scarring results.
- If the burn goes deep into the dermis, the wound appears red, tan, or white; can take several months to heal and might scar.
Second degree burn
In all second-degree burns, the epidermis, including the
stratum basale is damaged
This is where the stem cells are found
stratum basale
- the epidermis and part of the dermis are removed form another part of the body and placed over the burn
split skin graft
When it is not possible or practical to move skin from one part of the body to a burn site, physicians sometimes use
artificial skin
