Chapter 4 Flashcards
covers surfaces, line body cavities, and form protective sheets around organs
Body Membranes
Simple Organs; contains an epithelial layer and an underlying layer of connective tissue
Epithelial Membrane
is composed of two layers, the superficial epidermis (has stratified squamous epithelium) and the underlying dermis (mostly dense (fibrous) connective tissue); exposed to air and is a dry membrane
Cutaneous Membrane / Skin
composed of epithelium resting on a loose connective tissue membrane; lines all body cavites that open to the exterior
Mucous Membrane / Mucosa
composed of a single layer of simple squamous epithelium resting on a thin layer of areolar connective tissue; lines body cavities that are closed to the exterior
Serous Membrane / Serosa
covers the organs
Visceral Layer
lines the wall of the ventral body cavity
Parietal Layer
line the fibrous capsules surrounding joints, where they provide a smooth surface and secrete a lubricating fluid
Synovial Membrane
functions of the integumentary system
- Protects
- Temperature
- Mini-Excretory System
- Chemical Plants
- Sensation
- Storage of Water and Lipids
- Absorbtion
- Communication
deepest; lies closest to the dermis
Stratum Basale
8-10 cell layers with irregular, polyhedral cells with cytoplasmic spiky/spiny processes, that extend outward and contact neighboring cells by desmosome; contains keratinocytes and Langerhans cells
Stratum Spinosum
granule cell layer; contains diamond shaped cells with keratohyalin granules amd lamellar granules
Stratum Granulosum
thin clean layer consisting of eleidin which is a transformation product of keratohyalin; only occurs where skin is hairless and extra thick like palm and sole
Stratum Lucidum
uppermost layer, made up of keratin and horny scales made up pf dead keratinocytes
Stratum Corneum
Function of epidermis
- Protect
- Waterproofing
- UV protection
- Immune defense
- Sensation
a strong, stretchy envelope that helps bind the body together
Dermis
superficial dermal region
Papillary Layer
deepest skin layer
Reticular Layer
Function of dermis
- Support and elasticity
- Nourishment of the Epidermis
- Temperature regulation
- Sensation
- Excretion and moisture
an area of skin and underlying tissue damage; aka pressure ulcer or bed sore
Decubitus Ulcer
causes of decubitus ulcer
- Prolong pressure
- Friction
- Shearing
- Moisture
intact skin with non-blanchable redness of a localized area
Stage I of Decubitus Ulcer
partial thickness skin loss of dermis
Stage II of Decubitus Ulcer
full thickness skin loss
Stage III of Decubitus Ulcer