Skin & Body Membranes Flashcards
1
Q
Cutaneous membrane
A
- Epithelial membrane
- Location: skin, outermost protective boundary
- Epidermis: keratinized stratified squamous epithelium
- Dermis: dense connective tissue
2
Q
Mucous membrane
A
- Epithelial membrane
- Location: body cavities that open to exterior
- Stratified squamous epithelium (mouth, esophagus)
- Simple columnar epithelium (rest of digestive system)
- Underlying loose connective tissue, lamina propria
- Absorption, secretion
3
Q
Serous membrane
A
- Epithelial membrane
- Location: open body cavities closed to exterior
- Surface: simple squamous epithelium
- Underneath: areolar connective tissue
- Visceral layer (outside of organ) paired with parietal layer (lines portion of ventral body cavity), separated by serious fluid
- Ex. peritoneum (abdominal cavity), pleura (around lungs), pericardium (around heart)
4
Q
Synovial membrane
A
- Connective membrane
- Location: fibrous capsules surrounding joints
- Made of connective tissue only
- Secretes a lubricating fluid
5
Q
Skin protects tissues from…
A
- Mechanical damage
- Chemical damage
- Bacterial damage
- UV radiation
- Thermal damage
- Drying out
6
Q
Layers of epidermis (deep to superficial)
A
Stratum basale Stratum spinosum Stratum granulosum Stratum ludicum (hands + feet) Stratum corneum
7
Q
Factors that determine skin color
A
Melanin (can be yellow, brown, black)
Carotene (orange-yellow pigment produced by some vegetables)
Hemoglobin (red coloring from blood cells in dermal capillaries, brighter red = more oxygen)
8
Q
Basal cell carcinoma
A
- Least malignant
- Most common
- Arises from stratum basale
9
Q
Squamous cell carcinoma
A
- Early removal allows good chance of cure
- Believed to be sun-induced
- Can spread to lymph nodes if not removed
- Arises from stratum spinosum
10
Q
Malignant melanoma
A
- Most deadly
- Metastasizes rapidly to lymph and blood vessels
- Arises from melanocytes
11
Q
First-degree burn
A
- Skin is pink or red but no blistering
- Only epidermis is damaged
12
Q
Second-degree burn
A
- Blistering
- Injury to epidermis and upper region of dermis
- Regrowth is possible with no permanent scars if infection is avoided
13
Q
Third-degree burn
A
- Full-thickness burn
- Destroys entire thickness of cell
- Appears grey-white or blackened
- Regeneration is not possible
14
Q
Stratum basale
A
Lies next to dermis, cells undergoing mitosis, daughter cells pushed upwards
15
Q
Stratum spinosum
A
Spiny
