Epithelial Tissue Flashcards
epithelial tissue definition
covering or lining
epithelial tissue characteristics
lacks intercellular material
non-vascular
nerve supply
miotic
epithelial tissue functions
protection
secretion
absorption
filtrarion
epithelial tissue shapes
squamous
cuboidal
columnar
transitional
glandular epithelia
releases fluids
glandular epithelia structure
simple: unbranched
compound: branched duct
merocrine
secrete by exocytosis
pancreas, salivary glands, sweat glands
holocrine
accumulate products, then discharges
sebaceous glands
apocrine
accumulate at tip and cell pinches off
mammary gland
connective tissue
loose or areolar
3 fiber types
collagen
reticular
elastic
adipose tissue
fat tissue
reticular tissue
reticular fibers
reticulocyte
dense regular tissue
white fibrous
elastic tissue
has elastin
hyaline cartilage
has chondrocytes
hardest cartilage
fibrocartilage
intervertebral discs
bone
dense compact bone tissue
haversian canal
canals that hold blood vessels in the bone
lamella
bone membrane
blood tissue cell types
rbc
ebc
erythrocytes
leucocytes
platelets
thrombocytes
skin functions
protection
insulation
storage
regulation of body temp
sensation
synthesis of vitamin d
excretion
what type of skin is the epidermis
keratinized stratified squamous
what type of tissue is the dermis
connective tissue
what type of tissue is the hypodermis
superficial fascia
major cell types of the epidermis
keratinocytes
melanocytes
langerhans cells
merkel cells
langerhans cells
immune system
merkel cells
sense of touch
layers of the epidermis
stratum basale SB (deepest)
stratum spinosum SS
stratum granulosum SG
stratum lucidum SL
stratum corneum SC
stratum basale
deepest layer
miotic activity
stratum spinoosum
keratinocytes
stratum granulosum
keratohyaline granules
stratum lucidum
only in thick skin
stratum corneum
outermost dead skin cell layer
how many layers is the dermis
2
papillary region
areolar ct
dermal papillae
nerve endings
reticular region
lower 80%
blood vessels
sweat gland
apocrine
sebaceous gland
holocrine