A tissue is a collection of nearby cells that are arranged to carry out one or more particular jobs.
Epithelial tissue, connective tissue, muscular tissue, and nerve tissue are the four basic tissue types, each of which is distinguished by its appearance and purpose.
Epithelial tissue: The transport of ions and molecules occurs in epithelial tissue, which also establishes protective borders.
Connective tissue: Other tissue types are supported and anchored by connective tissue. Organs are supported and protected by connective tissue, which also serves to bind together the various body sections.
Muscular tissue: In order for the body to move, muscle tissue must contract. Body movement is made possible by the muscles.
Nerve tissue: Through the central and peripheral nervous systems, nervous tissue communicates and combines information.