Eden A. answered • 02/23/25
My goal is to make complex concepts easy for you!
The 4 main tissues are: Epithelial Tissue (epithelium), Connective tissue, Muscle tissue and Nervous tissue.
Epithelial tissue is a sheet of cells that covers a body surface or lines a body cavity and has 2 forms which are covering and lining epithelium & glandular epithelium. The functions of epithelial tissue are protection, absorption, filtration, sensory reception and excretion and secretion.
Connective tissue is in the name! It connects, supports, binds or separates other tissues or organs. It has 4 main classes and lots of subclasses, but the 4 main classes are connective tissue proper (fat & fibrous tissue of ligaments), cartilage, bone and blood. The major functions of this tissue are binding, supporting, protecting, insulating, storing reserve fuel and transporting substances.
Muscle tissues are well vascularized (has lots of blood vessels) and the cells in this tissue are tightly packed! There’s 3 types of muscle tissues which are skeletal muscle, cardiac muscle and smooth muscle. Muscle tissue is responsible for body movement.
Nervous tissues are a specialized tissue of the nervous system (nervous system is made up of the Central Nervous System which includes the brain and spinal cord & the Peripheral Nervous System which includes the rest of the nerves within the body). Nervous tissue has 2 major cell types which are the neurons and the supporting cells. The job of nervous tissue is to transmit electrical signals from sensory receptors and to its effectors (muscles & glands). And the supporting cells support and protect neurons.
