by Whitney Gandy
What is a Tissue?
A tissue is a group or mass of similar cells working together to perform common functions.
What are the Four Major Types of Tissues?
What are the Functions of Tissues?
Epithelial: protection, secretion, absorption, excretion, sensory perception
Connective: support, protection, framework, produces blood cells, fights infections, helps repair
Muscle: movement, posture maintenance, joint stabilization, heat generation
Nervous: sensing stimuli, transmitting signals to and from parts of an organism
Epithelial: simple squamous, simple cuboidal, simple columnar, stratified squamous, pseudostratified columnar, transitional epithelium
Connective: areolar tissue, adipose tissue (fat), fibrous tissue, cartilage, bone tissue, blood tissue
Muscle: skeletal, smooth, cardiac
Nervous: neurons, neuroglia
Specializations of Epithelial
- lateral cell surfaces
- maintain close cell-to-cell contact and form covering sheets
- epithelium structurally and functionally polarized to increase efficiency of absorption and transport
- Epithelial: air sacs of lungs, kidney tubules, digestive tract, uterus, mouth, outer layers of skin, lining air passages, lining urinary bladder
- Connective: tendons, ligaments, blood, external ear, larynx, ends of bones and joints
- Muscle: wall of the heart, stomach, in hollow organs
- Nervous: brain, spinal cord, nerves