Tissues

As we all know cells group together in the body to form tissues - a collection of similar cells that group together to perform a specialized function.  

There are 4 primary tissue types in the human body: epithelial tissue, connective tissue, muscle tissue and nerve tissue.

 Epithelial tissue are the ones who covers and lines many parts found in the body and the body itself. Epithelial tissue is classified by their shape and arrangement. The cells can be squamous (scale like or flat), cuboidal (cubed-shaped), columnar (column like), andtransitional (stretchy and variably shaped. If the cells are arranged in single layer it is classified as simple. If the cells are arranged in several layers we classify them as stratified.

Connective tissues are found in organs, bones, nerves, membranes, and skin. Its job is to hold things together to provide structure and support. Connective tissues have 3 characteristics, areolar tissue which is composing of delicate webs of loosely connected tissues, adipose tissues are more densely flatted and form cord like structures, and dense connective tissueare densely packed and forms barriers.

Muscle tissue provides the means of movement by and in the body. There are 3 different characteristic of muscle tissue. Skeletal muscle or sometimes called striated is attached to the bones and causes movement. Cardiac muscles or considered as involuntary muscles are found in the walls of the heart. Lastly, smooth muscles or visceral tissues form the walls of the hollow organs such as our digestive system.

Nervous tissues act as a rapid messenger service for the body. There are 2 types of nerve cells. Glia cells function as support by helping the hold the neurons in place. Neurons are the conductors of information.

            This discussion would have been better if our teacher used pictures and images. I liked the way he discussed this topic by the use of charts which makes it easier for us to appreciate the topic. Over all, it was interesting and educated. :)