chapter 5

• 1)skin
• 2)skin
• 3)above or over
• 4)horn; keratin
• 5)moon

• A) Cutaneous Membrane
• an organ consisting of epithelial and connective tissue.

• B) Accessory Structure
• hair, nails and various exocrine glands.

• 1) protection (physical barrier retain body fluids)
• 2) temperature homeostasis
• 3) synthesizes vitamin d
• 4) stores nutrients(lipids stored in adipose tissue serve as energy)
• 5) sensory reception
• 6) excretion

• Epithelial Tissue = epidermis
• Connective Tissue = dermis

true

stratified squamous epithelium

• stratum germinativum (basale layer)
• stratum spinosum
• stratum granulosum
• stratum lucidum (thick skin only)
• stratum carneum

palms of your hands and soles of your feet

• the deepest epidermal layer
• single layer of cell attached to the basement membrane
• avascular
• contain germenativum cells which are stem cells(dividing)
• contain meloncytes(melanin transfered to the epithelial cell coloring the epidermis)

true

a) cells continue to divide and contribute to the thickness of the epithelial

b) spiny layer

• grainy layer
• displaced cells from stratum spinosum
• cells no longer divide
• cells begin to produce the protein keratin

• durable
• water resistant

• found in thick skin
• a clear layer
• consist of flattened, densley packed cells that are filled with keratin.

• the most outter/superficial layer of epidermis
• consits of 15 to 30 layers of flattend dead epithelial cells
• large ammounts of keratin keratinized cells

2to 4 weeks

• a) beneath the epidermis
• b) connective tissue