Histology Flashcards
simple epithelium
one layer of cell
simple squamous
one layer of flattened cells
simple cuboidal
one layer of cells about as tall as wide
simple columnar
one layer of cells about as tall as wide
pseudostratified columnar
one layer of tall cells that appear stratified
stratified epithelium
two or more layers of cells
stratified squamous
multiple layers, upper layers of flattened cells
stratified cuboidal
two or more layers, cells about as tall as wide
stratified columnar
two or more layers of tall narrow cells
transitional
multiple layers of cells that change shape when stretched
(stratified) keratinized
superficial cells are dead
nonkeratinized
superficial cells are living
connective tissue
connective tissue serves to connect different structures to fill up the spaces between different spaces or boarders created by epithelial tissues. connective tissue is the most diverse abundant and widely distributed of the tissues. all connective tissue is made up of the three basic components
- cells
- protein fibers
- ground substance
areolar connective tissue
scattered fibroblasts, few elastic and collagen fibers, lots of blood vessels
adipose connective tissue
closely packed adipocytes; nucleus pushed to the edge of cell by large fat droplet, contains many blood vessels
reticular connective tissue
fibroblasts and numerous leukocytes within a ground substance, meshwork of reticular fibers
dense regular connective tissue
fibroblasts squeezed between densely packed parallel arrays of collagen fibers; not a lot of ground substance
dense irregular connective tissue
fibroblasts between densely packed but randomly arranged and clumped collagen fibers; more ground substance than in dense regular connective tissue extensive blood vessels
elastic connective tissue
limited fibroblasts between densely packed elastic fibers
hyaline cartilage
irregularly arranged chondrocytes in lacunae, glassy appearing ground substance collagen fibers are not visible
fibro cartilage
large chondrocytes in lacunae, numerous, parallel collagen fibers, limited ground substance
elastic cartilage
closely packed chondrocytes in lacunae, abundant elastic gibers that form weblike mesh, limited ground substance
bone
osteocytes within lacunae entrapped in calcified hard extracellular matrix which contains protein fibers (primary collagen and ground substance) compact bone organized in osteons
blood
contains formed elements (erythrocytes, leukocytes, and platelets) dissolved proteins within a liquid ground substance called plasma
