Tissue Types
Epithelial, Connective, Muscle, and Nervous
Epithelial Tissue
Epithelial tissue is classified by both cell shape and cell arrangement. Cell shape includes squamous or flat and scale-like, cuboidal which is cube-shaped, and columnar which means that the cells are tall and elongated. The cell arrangement on the other hand can either be simple or stratified, meaning either a single layer of cells or stacked layers. Epithelial tissue is responsible for protection, absorption, filtration, and secretion.
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Why is Epithelial Tissue the best type for its location and function?
Epithelial tissue is the best because the amount of layers it consists of can change. When the tissue's role is to protect, it can become stratified and have the required amount of layers for adequate protection. In places such as the kidneys where epithelial tissue is required for filtration, simple epithelial tissue instead of stratified helps to better perform that function. Since epithelial tissue is responsible for lining the surfaces and cavities of your body's organs it is important that it comes in such varieties to suit each different organ's functions to the best of its ability.
The other three types are...
Connective Tissue
Connective tissue consists of five different types of tissue including bone, cartilage, dense connective tissue, loose connective tissue, and blood. Although all types have different forms they all include an extracellular matrix. Some functions include connecting, binding and supporting structure, protecting and cushioning organs and tissues, insulating and storing fat(adipose), and transporting substances(blood).
Muscular Tissue
Muscular tissue can be divided into three categories-skeletal, smooth, and cardiac. Skeletal muscles are found in bones and aid in body movement. Smooth muscles are found in organ and blood vessel walls and are responsible for moving blood, food, and wastes. Cardiac muscles are found in the heart walls and are the reason for the contractions of the heart beat.
Nervous Tissue
Nervous tissue is made up of long and string-like specialized cells. The main function of nervous tissue is to generate and transmit nerve impulses to and from body organs via neurons and some support, but they also insulate and protect neurons.