by Alexis Morris
What is a tissue?
A tissue is a group of cells working together to perform certain functions.
The 4 types of tissues are:
- muscles- movement, maintenance of posture, joint stabilization, and heat generation
- nervous-receives information from skin and muscle sensory receptor and sends out movement instructions
- Epithelial-Protection, secretion, absorption, excretion, sensory perception
- connective- to support, anchor, and connect various parts of the body
- muscle- cardiac, skeletal, and smooth
- nervous- nuerons, nueroglia
- epithelial- transitional, stratified columnar, stratified cuboidal, stratified squamous, psuedostratified ciliated columnar, simple columnar, simple cuboidal, and simple squamos
- connective- loose, adipose, fibrous, cartilage, bone, and blood
Specialization 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
Where these tissues can be found
- muscular- stomach, walls of the heart, and hollow organs
- nervous- brain, spinal cord, and nerves
- epithelial- skin, lungs, the gastrointestinal tract, the reproductive and urinary tracts, and make up the exocrine and endocrine glands.
- connective- all throughout the body