Skin/Integumentary System Flashcards
Overall functions of the integumentary system.
- Protection
- Thermoregulation
- Sensation
- Excretion
- Immune defense
- Synthesis of vitamin D
- Blood reservoir
- metabolic functions
- Aesthetic and social functions.
- Communication
What kind of Epithelial tissue are the epidermis composed of?
Keratinized stratified squamous epithelium
What kind of connective tissue are the Dermis composed of?
Dense irregular connective tissues
What are the 4 principal cells of the skin
- Keratinocytes
- Melanocytes
- Langerhans cells
- Tactile disc
What’s the percentage of keratinocytes of the epidermal cells?
85%
What’s the percentage of melanocytes of the epidermal cells?
8%
What’s the percentage of langerhans cells of the epidermal cells?
5%
What’s the percentage of Tactile disc of the epidermal cells?
2%
The fibrous protein that provides structural strength to skin, hair and nails that is produced by keratinocytes?
Keratin
What determines skin, hair and eye colours produced by melanocytes?
Melanin
Which epidermal skin cells is involved in immune responses?
Langerhans cells/intra epidermal macrophages.
Which epidermal skin cell function as touch receptors?
Tactile disc
What are the Epidermal strata?
- Stratum basale
- Stratum spinosum
- Stratum granulosum
- Stratum Lucidum
- Stratum corneum.
Which is the deepest layer of the skin cell?
Stratum Basale
Which skin cells is present in thick skin (palms and soles)
Stratum Lucidum
Which is the most superficial/ outermost layer?
Stratum corneum
Which region is the uppermost layer of the Dermis?
Papillary region
The papillary region consist of what connective tissue?
Loose Areolar connective tissue
What is the region that has the deeper and thicker layer of the Dermis?
Reticular region.
The reticular region consist of which Connective Tissue?
Dense irregular connective tissues
Skin colour is determined by 3 pigments namely?
- Melanin
- Carotene
- Hemoglobin
Functions of the Hair
Protection
Sensation
Thermoregulation
Function of the nail?
Protection
Sensation
Grip
Each nail consist of?
Free edge
Lunula
Nail body
Nail root
Nail bed
Nail matrix
Eponychium(cuticle)
What kind of tissue are the epidermis composed of?
Epithelial tissue
What kind of tissue are the Dermis composed of?
Connective tissue
Dead, scaly, interlocking keratinized cells are called?
Corneocytes
Thick skin has hair follicles or sebaceous glands?
True or False?
False
All people have about same number of melanocytes.
True or False
True
