How does tissues form an organ

For example, the heart Biology of the Heart The heart and blood vessels constitute the cardiovascular circulatory system. The heart pumps the blood to the lungs so it can pick up oxygen and then pumps oxygen-rich blood to the body The eye Structure and Function of the Eyes The structures and functions of the eyes are complex.

Each eye constantly adjusts the amount of light it lets in, focuses on objects near and far, and produces continuous images that are instantly Even an organ as apparently simple as the gallbladder Gallbladder and Biliary Tract The gallbladder is a small, pear-shaped, muscular storage sac that holds bile and is interconnected to the liver by ducts known as the biliary tract.

See also Overview of the Liver and Gallbladder Merck and Co. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.

The Manual was first published in as a service to the community. Learn more about our commitment to Global Medical Knowledge. The four basic tissue types are epithelial, muscle, connective, and nervous tissue. Each tissue type has a characteristic role in the body:.

An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. The liver, stomach, brain, and blood are all different organs and perform different functions.

Each organ is a specialized functional center responsible for a specific function of the body. At the organ level, complex functions become possible because of the specialized activities of various tissues.

Most organs contain more than one tissue type. For example, the stomach consists of smooth muscle tissue for churning movement while it is innervated, but it is also supplied by blood, which is a connective tissue. The next level is the organ system level. Many organs working together to accomplish a common purpose create an organ system. Whether your talking about delicate tissue of the brain or the hardness of bone, it's still made of cells banded together into tissue and organized into organs.

Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Khan YS, Farhana A. Histology, cell. Updated May 10, Standring S, ed. Section 1: Cells, tissues, and systems. Elsevier; National Institute of General Medical Sciences. Studying cells. Updated March 11, Skin laceration repair with sutures.

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