Layers of the Epidermis
Bottom most layer of epidermis, contains melanocytes and merkel cells
stratum basale
Name the three main layers of the integumentary system
epidermis, dermis, hypodermis
Name the 3 accessory structures we covered
Hair, nails, glands
This surface of epithelial cells is opposite the basal surface
Apical surface
List the 4 categories of connective tissue we covered
Fibrous, cartilage, blood, bone
Second layer of epidermis, contains keratinocytes
stratum spinosum
melanin
What part of a hair follicle supplies it with nerves and blood
hair papilla
How are endocrine glands different from exocrine glands
Exocrine releases substances onto the skin surface. Endocrine releases into the blood stream
Which type of connective tissue lacks direct blood supply
cartilage
Third layer of epidermis, cell are now packed with keratin and beginning to die
stratum granulosum
Which layer of the integumentary system is constantly dying and regenerating and what is the duration of its lifecycle
epidermis, 1-2 weeks
The muscle is responsible for goose bumps
Arrector Pili
Draw stratified squamous epithelium and give its location in the body
Drawing + skin
Give the location and function of regular dense connective tissue
Holds things together, tendons and ligaments
Optional layer of epidermis only found in hands and feet
stratum lucidum
This layer of the dermis is made of areolar tissue and has blood vessels
papillary layer
This gland secretes an oil that is responsible for keeping moisture in our hair and when blocked can cause acne
sebaceous gland
Draw pseudostratified columnar epithelium
drawing
Give the location (which layer of skin?) and function of adipose tissue
Hypodermis, stores fat
Oldest and top most layer of epidermis. Cells are completely dead and flat
stratum corneum
This layer of the dermis is made of dense irregular connective tissue that gives skin its strength and stretch
reticular layer
What is the difference between apocrine glands and merocrine glands
apocrine= oils in armpits
Merocrine = saltwater sweat
Draw simple cuboidal epithelium and give its location and function
Drawing + filtration in kidney
Give the defining characteristics of white vs yellow vs reticular fibers in the matrix
White=collagen, Yellow=elastin, Reticular=highly branched