In what layer of the skin are cells capable of mitosis and cell division?
What is the dermis composed of?
Middle layer of skin Composed of: - connective tissue containing nerves and nerve endings - blood vessels - sebaceous and sweat glands - hair follicles - lymph vessels Further divided into two layers: - papillary layer - reticular layer
What is the composition of the subcutaneous or hypodermis?
Composed of subcutaneous tissue Tissue helps support, nourish, insulate, and cushion the skin
Name the skin accessory organs
Hair Nails Sebaceous glands Sweat glands
Describe the nail characteristics and name the nail proteins
Nails -flat platesnof keratin. - called nail body - cover ends of tissue by nail bed - connected to fingers and toes. - grow longer from the roots - covered and protected by cuticle - free edge is exposed edge - light colored half-moon area at the base is the lunula
Name the hair parts and name the proteins that the hair fibersnare composed of
Hair - hair follicles. - hair root - hair shaft. - fibers composed of the protein keratin - hair formation like - melanin gives hair its color - sebaceous glands
What gives hair its color?
What is released from the sebaceous gland into the follicle?
Where are the sensory receptors and what do they detect?
Located in the dermis They detect pressue, traction, heat, cold, and pain
Define melanocytes. What do they produce?
Melanocytes are cells that produce melanin for pigmentation.
What is the most common type of skin cancer and how can we prevent skin cancer?
Basal Cell Carcinoma To prevent skin cancer, wear proper clothing, use proper protection