Organs and Functions


What are the human organs and their function?

BLADDER -A hollow muscular organ that stores urine before expelling it from the body.

BONES - The bones provide 5 functions. They protect other vital organs, i.e. ribs protect the lungs. Support the body in an upright position. They are attached to muscles to help provide movement of the body. Bone marrow produces blood. Store salts inside provides a mineral reservoir for the body.

BRAIN -The brain is the master control center of the body. It receives information through the senses from inside and outside of the body. It analyzes this information then sends messages to the body that controls its functions and actions. The brain remembers past experiences, is the source of thought, moods, and emotions.

EARS - The ear converts sound which enters the ear canal, from mechanical vibrations into electrical signals that the brain interprets. The ear also contains a fluid that is vital for balance.

ENDOCRINE SYSTEM -The endocrine system is a collection of glands that secrete chemical messages called hormones. The hormones pass through the blood to the target organ resulting in a chemical change in the body.

EPITHELAIL TISSUE -Membranous tissue composed of one or more layers of cells forming the covering of most internal and external surfaces of the body and its organs.

EYES -The eyes collect light and then sends a message to the brain for integration.

GALL BLADDER -A small, pear-shaped muscular sac, located under the right lobe of the liver, in which bile secreted by the liver is stored until needed by the body for digestion.

HEART -The chambered muscular organ that pumps blood received from the veins into the arteries, thereby maintaining the flow of blood through the entire circulatory system to supply oxygen to the body.

KIDNEYS -A pair of organsfunctioning to maintain proper water and electrolyte balance, regulate acid-base concentration, and filter the blood of metabolic wastes, which are then excreted as urine.

LARGE INTESTINES -Beginning with the cecum and ending with the rectum; includes the cecum and the colon and the rectum; extracts moisture from food residues which are later excreted as feces

LIVER -A large, reddish-brown, organ located in the upper right portion of the abdominal cavity that secretes bile and is active in the formation of certain blood proteins and in the metabolism of carbohydrates, fats, and proteins.

LUNGS -Either of two spongy, saclike respiratory organs in most vertebrates, occupying the chest cavity together with the heart and functioning to remove carbon dioxide from the blood and provide it with oxygen.

MOUTH -The body opening through which an animal takes in food.

MUSCLES - A tissue composed of fibers capable of contracting to effect bodily movement.

NERVOUS SYSTEM -The system of cells, tissues, and organs that regulates the body's responses to internal and external stimuli. In vertebrates it consists of the brain, spinal cord, nerves, ganglia, and parts of the receptor and effector organs.

NOSE -The part of the human face or the forward part of the head of other vertebrates that contains the nostrils and organs of smell and forms the beginning of the respiratory tract.

PANCREAS -A long, irregularly shaped gland in vertebrates, lying behind the stomach, that secretes pancreatic juice into the duodenum and insulin, glucagon, and somatostatin into the bloodstream.

SKIN -The membranous tissue forming the external covering or integument of an animal and consisting of the epidermis and dermis.

SMALL INTERTINES -The upper portion of the bowel, in which the process of digestion is practically completed. It is narrow and contorted, and consists of three parts, the duodenum, jejunum, and ileum.

SPINAL CORD -The thick, whitish cord of nerve tissue that extends from the medulla oblongata down through the spinal column and from which the spinal nerves branch off to various parts of the body.

STOMACH -The enlarged, saclike canal, one of the principal organs of digestion, located between the esophagus and the small intestine.

TONGUE -The fleshy, movable, muscular organ, attached in most vertebrates to the floor of the mouth, that is the principal organ of taste, an aid in chewing and swallowing, and, in humans, an important organ of speech.


  • Facts about Human Organs
  • Pictures of Organs

    Other Helpful Links

    CS255 Computers in El Ed Home Page

    Link to Northern Michigan University


    N Sovey: nsovey@nmu.edu