Tissue Types

Paige Saunders

What is tissue?

Tissue is a group of cells similar in shape, or form, and preform common functions. There are four types of tissue: Epithelial, connective, muscle, and nervous tissue.


Epithelial Tissue

Epithelial tissue is found throughout the body. The epithelial cells are packed closely together to create a protective barrier. You can classify epithelial tissue as: squamous, cubodial, and columnar. It can also be simple or stratified. The first picture shows an example of simple cubodial; We know this because there is only one layer of cells and they are cube shaped. The second picture is of stratified squamous; We know this because there is more than one layer of cells and they are flat and scale like. In the third picture we have pseudostratified columnar; We know this because it appears to be more than one layer, but isn't.


Image: biology.uco.edu

Connective Tissue

Connective tissue works to connect, bind, support, bear weight, insulate and fill space, store fat, and transport nutrients. Bone, cartilage, loose CT, dense CT, and blood are all connective tissues.



Muscle Tissue

There are three types of muscle tissue: Skeletal, smooth, and cardiac. Skeletal (the first picture) is when muscle bundles and attaches to bones for movement. Smooth (the second picture) is used to move blood, food, and waste throughout the body's organs. Cardiac (the third picture) is used to control the heartbeat.




Nervous Tissue

Found in the brain, spinal cord, and nerves. It functions to generate and transmit nerve impulses to and from the body organs via neutrons.



Defense of Nervous Tissue

I think that nervous tissue is the best for its location, because it has to control the whole body. The nervous tissue is responsible for controlling bodily functions and activity. Nervous tissue is made up of different types of nerve cells. Each cell sends signals to the next. Without nervous tissue there would be no brain function and we couldn't receive movement instructions.