Epithelial Tissue
Large sheets of cell-based tissue known as epithelial tissue typically cover all exposed body surfaces and line internal body cavities. Furthermore, epithelial tissue is responsible for the formation of the vast majority of glandular tissue in the human body. All three major embryonic layers produce epithelial tissue.
- The ectoderm gives rise to the epithelial tissue that makes up the cutaneous membranes.
- The endoderm is where the majority of the mucous membrane epithelial tissue originates.
- Mesoderm is the source of epithelial tissue, which lines vessels and open spaces in the body.
The endothelium is the epithelial tissue that lines vessels in the lymphatic and cardiovascular systems, whereas the mesothelium is the epithelial tissue that forms the serous membranes lining true cavities.
Epithelial Tissue
A structural organisation in animals begins with the smallest fundamental unit – the cell. Tissues are made up of a collection of cells that all serve the same purpose. When tissues join together to perform specific functions, organs form. All organisms in the animal kingdom are multicellular, but their cell organisation does not follow the same pattern.
Every cell in our bodies is trained to perform a specific function. A tissue is made up of similar types of cells that are classified based on their structure and functions. The human body is made up of four different types of tissue: epithelial, connective, neural, and muscular.