Chapter 4
Organization at the Tissue Level
By Boundless
The human body consists of four types of tissue: epithelial, connective, muscular, and nervous. Epithelial tissue covers the body, lines all cavities, and composes the glands.
![Thumbnail](../../../../../figures.boundless-cdn.com/30955/square/illu-epithelium.jpeg)
Epithelial tissue is classified by cell shape and the number of cell layers.
![Thumbnail](../../../../../figures.boundless-cdn.com/7761/square/ers-of-collagen-type-i-tem.jpeg)
Connective tissue is incredibly diverse and contributes to energy storage, the protection of organs, and the body's structural integrity.
![Thumbnail](../../../../../figures.boundless-cdn.com/1711/square/-section-lipids-washed-out.jpeg)
Connective tissues encompass a diverse array of tissue types that are involved in binding and supporting body structure and tissues.
![Thumbnail](../../../../../figures.boundless-cdn.com/1720/raw/gi-organization.jpg)
The mucous membranes are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion.
![Thumbnail](../../../../../figures.boundless-cdn.com/1726/square/illu-synovial-joint.jpeg)
A synovial membrane is the soft tissue found between the articular capsule (joint capsule) and the joint cavity of synovial joints.