A&P Test

• protection
• sensation(sensory receptors)
• temperature regulation
• vitamin d
• excretion

resists abrasion and reduce water loss through skin

structural strength

connect the skin to underlying muscle

• keratinocytes(cells with keratin, makes ccells more durable)
• gives epidermis albilty to resist abrasion and reduce water loss

melanocytes(skin color)

langerhans cells(immune system)

merkel cells(associated with nerve ending responsible for detecting light touch)

• all five epithelial strate
• found in areas of alot of pressure and friction palms fingertips soles

cover rest of body

• protection agianst ultra viloent light
• package melanicytes into melanosomes

• papillary
• loos connective tissue
• blood vessels
• reticular layer
• dense irregular connective tissue

• lanugo delicate unpigmented hair
• termeinal hair replace lanugo hair in scalp eyelids and eyebrow
• velus hair- replace all over the rest

• shaft
• root
• hair bulb
• medulla
• cortex
• cuticle
• hair follical