Integumentary System Flashcards
What are the 3 layers of skin?
Epidermis, Dermis, Hypodermis/Subcutaneous
Which skin layer is described?
- Keratinized Stratified Squamous Epithelium
- Without hair contains five layers
- With hair contains three layers
Epidermis
What four cells make up the epidermis?
Keratinocytes, Melanocytes, Langerhans, Merkel
Which skin layer is described?
-Contains hair follicles, nerve endings, glands, smooth muscle, lymph and blood nodes
Dermis
What are the three cells that make up the dermis?
Fibroblasts, Adipocytes, Macrophages
What is the structure between the dermis and epidermis that cements them together called?
Dermil Papilla
Which skin layer is described?
- Composed of loose areolar tissue
- Location of SQ injections
Hypodermis/Subcutaneous
What is the process called that describes when a cell expires and travels to the superficial layers, loses its nuclei, and its organelles fill with keratin?
Keratinization
Which type of gland is described?
- Secretes oil
- Located in the dermis
- Used for trapping moisture, softening hair, reduces friction, and waterproofs
Sebaceous Glands
Which type of gland is described?
- Secretes water
- Found everywhere
- Helps cool the body
Sweat Glands
What two factors stimulate contraction of the arrector pilli muscle?
Frighten, Cold
What is the function of the arrector pilli muscle?
- Warm up the body (trapping air between skins and hairs)
- Seem Larger to predators
What type of hair contains sensory endings, which make it unique?
Tactile hairs
What are tactile hairs commonly called?
Whiskers
Why is the hypodermis important in veterinary medicine?
Vaccination Insertion Site
