Integumentary System Flashcards
Fibrous protein that helps give the epidermis its protective properties
Keratin
Produce keratin
Keratinocytes
Protection synthesizes vitamin d with uv Regulates body heat Prevents unneeded water loss Sensory receptors
Functions of skin
Keratinized stratified squamous epithelium Keratinocytes Melanocytes Merkel cells Langerhans
Epidermis
Stratum Basale Spinosum Granulosum Lucidum Corneum
Layers epidermis
Strong flexible connective tissue
Fibroblasts macrophages mast cells wbc
2 layers
Dermis
Papillary
Reticular
Dermis layers
Below the skin
Hypodermis
Skin pigments
Most important various types
Passes from melanocytes to keratinocytes in stratum basale
Melanin
Cells are dead
Many layers
Outer skin
Corneum
Only in palms and soles
Lucidum
Layers of flattened keratinocytes producing keratin
Hair and nails
Granulosum
Bundles of protein
Resist tension
Spinosum
Single row of cells attached to dermis
Youngest cells
Basale
Areolar connective tissue Includes dermal papilae Finger prints Indent epidermis Sweat poresf
Papillary
Secrets sweat water salt and wastes
Eccrine gland
Oil glands
Found all over cept for palms and soles
Sebaceous glands
Synthesize the pigment melanin
Found in deepest layer of epidermis
Melanocytes
Arise from bone marrow and migrate to epidermis
Macrophages tht help activate our immune system
Langerhans
Appendages of integumentary system
Nail hair
Warmth senses touch protection
Root embedded in skin growth 2 mm per week
Hair
Of hard keratin
Hooves And claws
Grows from nail matrix
Nails
Layer under dermis fat Hypodermis
Areolar
