chpt 4 integumentary system

DICT and deep dermis compose this

leather

epidermis function

Protects dermis from trauma, chemicals

Controls skin permeability, prevents water loss

papillary layer

nourishes and supports epidermis

reticular layer

Attaches skin to deeper tissues, lots of blood vessels

How is the germinative layer alive?

through the dermis

exocrine glands

ducts carry stuff onto skin, lubricates epidermis

Excretion

secretion

Function of deep facia

connects structures

subcutaneous layer

connective and adipose tissue layer just under the dermis

accessory structures

hair, nails, glands

Stratum Germanitivum (basale)

deepest layer, attached to basal lamina, contains stem cells, KERATINOCYTES ALIVE

stratum spinosum

a layer of the epidermis that provides strength and flexibility to the skin, KEROTINOCYTES ALIVE

stratum granulosum

keratinocytes die and lose their nuclei

stratum lucidium

only in thick skin - palms, soles

stratum corneum

outermost layer of dead keratinocytes, water resistant

dermal papillae

finger like protections made of LACT that keeps dermis attached, makes up finger prints (radioactive example)

What tissue is the papillary layer made of?

LACT

What tissue is the reticular layer made of?

Reticular

sebaceous glands

oil glands, antibacterial properties, merocrine

apocrine sweat glands

secretes viscous substance, mammary glands, hormonal

merocrine sweat glands

secrete a watery fluid directly onto the surface of the skin, nervous system and thermo