7.1 Anatomy of the Integumentary System Part 3 Flashcards
Which layer of the epidermis is constantly dividing to rebuild the skin?
stratum basale
How are dead skin cells removed?
through washing or friction
Which layer of the epidermis is dead and why?
most superficial because it is far away from the nutrient and blood supply
How long does it take for a cell to move from stratum basale to the top of the skin?
30 days
How long do dead cells remain on the stratum corneum?
about two weeks
What forms the epidermal ridges?
stratum basale
What are epidermal ridges?
projections that extend through the epidermis and form fingerprints
What are some of the cells types found in the epidermis?
keratinocytes
langerhans cells
fibroblast cells
melanocytes
Merkel cells
What are melanocytes?
skin cells that produce melanin
Which cells of the epidermis are involved in the body’s immune response?
langerhans cells
What are Langerhands cells?
act as a first line of defense helping to identify microorganisms before they reach the bloodstream
What are Merkel cells?
sensory receptor that respond to light touch
What are keratinocytes?
produce keratin which protect the exposed surfaces of the skin
What are fibroblast cells?
produce collagen which helps cells adhere to one another and produce skin elasticity
What are found within the dermis?
sweat glands
oil glands
sensory organs
