Tissue

A tissue is a group of similar cells that work together to perform a specific function.

The human body contains four main types of tissue: epithelial tissue, connective tissue, muscle tissue, and nervous tissue. Organs are made up of two or more types of tissue working together.

Tissues combine to form organs, and organs work together as organ systems.

QUICK FACT

The skin, heart, lungs, and liver each contain multiple types of tissue.

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Clinical & Educational Context

Discussed in Health Articles & Guides

Explore how "Tissue" is covered across our evidence-based editorial guides:

3 Articles
Unstraight Lines

Kill Me a Little, Kill It More

Other treatments act on processes within the human body, sometimes affecting both diseased and healthy tissues.
The Hard Parts of Medicine

Do You Need Supplements? What Medical Research Says

Vitamins help regulate processes such as energy metabolism, blood cell formation, immune function, and tissue maintenance.
Unstraight Lines

Blame the Hormone

The Medical Context Hormones are chemical messengers produced by organs and tissues throughout the body.