Skin Flashcards
What are the names of the two skin layers?
Epidermis and Dermis?
What name is given to the layer beneath the dermis?
Hypodermis
What is the structure and function of the hypodermis?
Adipose layer
Anchors skin to underlying structures
Describe the tissue making up the epidermis skin layer?
Stratified squamous keratinising epithelial tissue
What are the four main cell types found in the epidermal layer?
- Keratinocytes
- Melanocytes
- Langerhans cells
- Merkel cells
What is the function of keratinocyte cells?
- Structural role to keep other epidermal cells in place
- Role in immunity
What is the function of melanocyte cells?
Form pigment
What is the function of Langerhans cells?
Immune surveillance
What is the function of Merkel cells?
Touch receptors
Name the five epidermal layers from skin surface to dermis.
- Stratum Corneum
- Stratum Lucidium
- Stratum granulosm
- Stratum spinosum
- Stratum basale
Which epidermal layer involve the conversion of keratohyalin to keratin?
Stratum corneum and stratum lucidium
Which layer contains granules of keratohyalin?
Stratum granulosm
In which layer are cells bound to the basement lamina by hemidesmosomes?
Stratum basale
What is meant by keratinisation?
Organic process whereby keratin is deposited in cells, making them appear horny.
What are the two dermal skin layers?
- Papillary layer
2. Reticular layer
What type of tissue makes up the papillary layer of the dermis?
Loose connective
What type of tissue makes up the reticular layer of the dermis?
Dense irregular connective
What cells are responsible for the waterproof nature of skin?
Keratinocytes in the epidermis
What is the name of the muscle attached to a hair follicle?
Arrector pili muscle
What type of gland is an eccrine sweat gland?
Simple tubular with watery secretion
In what layer of the skin are eccrine sweat glands found?
Dermis
What features of the skin allow thermoregulation?
- Swet glands
- Blood vessel dilation
(3. Hair- but not in humans)
