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
Elastic Fibers
Smaller stretch and return to the original length(ear)
Reticular Fiber
Provide support and strength
-found in basement membranes and organ support
Areolar loose connective tissue
Attaches skin to the body
Adipose loose connective tissue
Store fat, insulation, cushion
Reticular loose connective tissue
Provides support and strength for blood vessels and soft organs
Dense regular
tendons and ligaments
Dense irregular
Heart valves and dermis
Elastic
lungs, blood vessels
Cartilage
- Dense network of collagen and elastic fibers
- strong dense fibrous
- no blood vessels or nerves
Hyaline Cartilage
- Reduces friction
- nose, end of bones
Fibrocartilage
Very strong and rigid
-Intervertebral disks
Elastic Cartilage
Maintain shape
-ears
2 Bone tissues
- Compact bone
- spongy bone
Blood
specialized liquid connective tissue
-platelets composed of red and white blood cells
Skeletal muscle
- Movement
- Voluntary control
Cardiac Muscle
- Heart
- Involuntary control
Smooth Muscle
- Walls of hollow organs and blood vessels
- Involuntary control
Types of nerve tissues
Function
Location
- neurons (nerve cells)
- Neuroglia
- Receive stimuli from the environment
- Transmit nerve impulses/signals
- In the nervous system