Ch. 3 Flashcards
epithelial tissue
-closely adhering cells
-internal lining of hollow organ or body cavity, external surface of organ, secretory tissue pf a gland
-protection, secretion, excretion, and absorption
-avascular
basement membrane
-anchors epithelium to connective tissue, regulates exchange of materials, binds growth factors
-contains: collagen and glycoproteins
-basal surface: faces basement membrane
-apical surface: faces away from basement membrane
simple epithelia
every cell rests on basement membrane
-simple squamous epithelium
-simple cuboidal epithelium
-simple columnar epithelium
-pseudostratified columnar epithelium
stratified epithelia
some cells rest on top of others and don’t touch basement membrane
-stratified squamous epithelium
-stratified cuboidal epithelium
-stratified columnar epithelium
-urothelium
connective tissue
more extracellular matrix than cells
binding of organs
support
physical protection
immune protection
movement
storage
heat production
transport
fibrous connective tissue cells
fibroblasts
macrophages
leukocytes
plasma cells
mast cells
adipocytes
fibroblasts
produce fibers and ground substance
macrophages
eat bacteria and debris
leukocytes
white blood cells (i.e. neutrophils and lymphocytes) that help in body defenses
plasma cells
produce antibodies
mast cells
secrete heparin and histamine
adipocytes
fat cells
fibrous connective tissue fibers
collagenous
reticular
elastic
collagenous fibers
tough and flexible (tendons and ligaments)
reticular fibers
thin collagen fibers (spleen and lymph nodes)
elastic fibers
stretch and recoil (lungs)
loose connective tissue
areolar
reticular
areolar
abundant, binds epithelia to deeper tissue
reticular
supports lymphatic organs
dense regular connective tissue
highly organized fibers
fibroblasts
tendons and ligaments
ex: elastic tissue
dense irregular connective tissue
random arrangement of fibers
resists stress
most of the dermis
adipose tissue
stores energy
protection
cartilage
chondroblasts
lacunae
chondrocytes
avascular
types: hyaline, elastic fibrocartilage
chondroblasts
cells that secrete cartilage matrix
lacunae
small cavity surrounding a chondrocyte
chondrocytes
cartilage cells in lacunae
hyaline cartilage
eases joint movements, holds airway during respiration, precursor of bone in fetal skeleton
over ends of bones at joints
elastic cartilage
flexible, elastic support
ear, epiglottis
fibrocartilage
resists compression and absorbs shock in joints
pubic symphysis, intervertebral discs
bone
spongy bone and compact bone
-central canal
-lamellae
-osteon
-osteocytes
-canaliculi
-periosteum
blood
plasma
formed elements: erythrocytes (RBCs), leukocytes (WBCs), platelets
nervous tissue
neuroglia cells and neurons
neuroglia (glial) cells
support the neurons
neurons
transmit information
muscular tissue
skeletal, cardiac, smooth
skeletal muscle
muscle fibers
striations
voluntary
cardiac muscle
cardiomyocytes
striations
intercalated discs
involuntary
smooth muscle
fusiform myocytes
non-striated
involuntary
endocrine gland
secretes hormone into blood
exocrine gland
uses duct to secrete to body surface or cavity
exocrine secretion types
serous glands, mucous glands, mixed glands
serous glands
secrete thing, watery fluids
mucous glands
secrete mucin that absorbs water to form mucus
mixed glands
secrete a mix of watery and mucous secretions
exocrine secretion methods
eccrine (merocrine) glands
apocrine glands
holocrine glands
eccrine (merocrine) glands
exocytosis
tear glands, pancreas, gastric glands
apocrine glands
droplets bud from surface
mammary and axillary glands
holocrine glands
entire cell disintegrates
thick, oily secretion
oil producing glands of scalp and eyelid
membranes
cutaneous, mucous, serous
cutaneous
largest membrane; skin
mucous
lines passageways to openings
layers:
- epithelium
- lamina propria (areolar connective tissue)
- muscular mucosae (simple squamous)
hyperplasia
cell multiplication
hypertrophy
enlargement of cells
neoplasia
tumor development
differentiation
specialization of form or function
metaplasia
change from one tissue to another
regeneration
replacement of dead cells
fibrosis
scar tissue development
atrophy
reduction in size or number
necrosis
pathological death of tissue
apoptosis
programmed cell death