A Tale of Two Tissues...Form Meets Function

Stratified Squamous Epithelial Tissue

Tissues are one of the most diverse structures in the human body. They can stretch, protect and filter  to fill the needs of the body. The diversifying element in tissues are their form. Different form, different function. For example, simple squamous tissue is a single layer of small cells that are used for absorption, secretion, and exchange of substances. Their small shape allows for quicker diffusion, like in the lungs where gases need to be exchanged efficiently. Stratified Squamous has a similar name but a remarkably different function. Stratified tissue has multiple layers and in this case is used where friction is often found. This way a layer can be removed and the body is not harmed. Stratified Squamous tissue makes up the skin, mouth, and esophagus. Imagine you get scraped by something, and you're down to the muscle? Not a pretty sight, and this is exactly why multiple layers are absolutely essential. These are both types of Epithelial Tissue. Other types include Connective, Muscle, and Nervous Tissue. Each of these three Tissue types has a radically different function, yet they are all tissues. 

Potatoes

Tissues are like potatoes- there are different functions for potatoes (mashed, baked,  or made into a  delicious salad), but in the end they are all potatoes. Getting back to tissues, there are even different shapes they can be. Long, short, or something in between. They can be stretchy, hard, and even pliable.As mentioned in the video, there are many very different functions of silk. It can be made into clothes, but can also filter and be woven into ropes. Concerning tissues, the point of having all these forms, and therefore functions is to create a diversity of capabilities, and support homeostasis. A single type of tissue cannot maintain homeostasis alone. Nervous tissue can sense stimuli and send a signal to muscles to expand or contract. The tissue on the skin (stratified squamous) keeps out foreign invaders and maintains internal temperature. This isn't just a tale of two tissues, it is a tale of many that work together to keep the body in tip top shape. 

Stratified Squamous Tissue Image From http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkowski/TissueSlides.htm
Potatoes Image From
http://www.foodsubs.com/Potatoes.html