Tissues Flashcards
Tissue
A group of similar cells working together to perform a function
Histology
Study of Tissues
Epithelial Tissue
- Protection
- lines body cavities and hollow organs
Avascular
lack of blood cells
-epithelial tissues
Simple
one layer of cells
Stratified
2 or more layers
Squamous
- flat, irregular
- “squished”
Cuboidal
-Cube/ Square
Columnar
columnar/ rectangular
Simple Squamous
-Diffusion and Filtration
lines blood vessels, lungs, body cavities
Called endothelium when
lines heart, blood, lymphatic vessels
Called mesothelium when
in serous membrane
Simple cuboidal epithelium
Absorption and secretion
Simple columnar epithelium
- Absorption and secretion
- non-ciliated
- A lot in the digestive system and pancreas
Luman
-Duct/ Opening
Stratified Squamous Epithelium
- Protection
- Skin, mouth
Transitional Epithelium
- changes shape as it stretches and relaxes
- Elasticity
- Urinary Bladder
Pseudostratified Columnar
- 1 layer but looks like many layers
- Secretion
- Upper Respiratory Tract
Types of connective tissue
- Loose connective tissue
- Dense connective tissue
- Cartilage
- Bone
- Blood
Connective tissue
- Support
- most abundant tissue
- between other tissues
- good blood supply
Matrix
-Ground substance (filler) and embedded fibers
Fibroblasts
- Most common connective tissue cell
- Present in several tissues
- secrete fibers and ground substances
Extracellular Matrix
- fluid, gel, or solid plus protein fibers
- ground substance-between cells and fibers
Collagen Fibers
Very strong and flexible