Organization at the Tissue Level

The human body is organized at several levels of scale that can each be examined. 

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. 

Epithelial tissue is classified by cell shape and the number of cell layers. 

Connective tissue is incredibly diverse and contributes to energy storage, the protection of organs, and the body's structural integrity.

Connective tissues encompass a diverse array of tissue types that are involved in binding and supporting body structure and tissues.

Nervous tissue is the main component of the nervous system, which includes the brain, spinal cord, and nerves.

The nervous system consists of nervous tissue, which is composed of two principal types of cells called neuron and neuroglia.

The three types of muscle tissue are skeletal, smooth, and cardiac.

The function of muscles is movement, but the types of movement elicited differ between skeletal, cardiac, and smooth muscle.

The mucous membranes are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion.

A synovial membrane is the soft tissue found between the articular capsule (joint capsule) and the joint cavity of synovial joints.