- Bone Marrow: Topic Page
Soft tissue filling the spongy interiors of animal bones. Red marrow is the principal organ that forms blood cells in mammals, including humans. As the skeleton matures, fat-storing yellow marrow displaces red marrow in the shafts of the long bones of the limbs.
- Brain: Topic Page
The supervisory center of the nervous system in all vertebrates.
- Heart: Topic Page
Muscular organ that rhythmically contracts to force blood around the body of an animal with a circulatory system.
- Intestine: Topic Page
Muscular hoselike portion of the gastrointestinal tract extending from the lower end of the stomach (pylorus) to the anal opening.
- Kidney: Topic Page
Either of a pair of organs at the back of the abdomen whose function is the removal of waste pro-ducts from the blood, and the excretion of such compounds from the body, usually in the form of urine.
- Liver: Topic Page
Largest glandular organ of the body, weighing about 3 lb (1.36 kg).
- Lung: Topic Page
In mammals, large cavity of the body, used for gas exchange.
- Pancreas: Topic Page
Glandular organ that secretes digestive enzymes and hormones.
- Stomach: Topic Page
Saclike dilation in the gastrointestinal tract between the esophagus and the intestines , forming an organ of digestion.
From Dorland's Illustrated Medical Dictionary
A large glandlike but ductless organ in the upper part of the abdominal cavity on the left side. It is the largest structure in the lymphoid system.
- Ear: Topic Page
Organ of hearing and equilibrium. The human ear consists of outer, middle, and inner parts.
- Eye: Topic Page
Organ of vision and light perception. In humans the eye is of the camera type, with an iris diaphragm and variable focusing, or accommodation.
From the The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
The organs of smell are confined to a small area in the roof of the nasal cavity. The olfactory cells are stimulated when certain molecules reach them.
- Skin: Topic Page
The flexible tissue (integument) enclosing the body of vertebrate animals. In humans and other mammals, the skin operates a complex organ of numerous structures (sometimes called the integumentary system) serving vital protective and metabolic functions.
From Taber's Cyclopedic Medical Dictionary
A freely movable muscular organ that lies partly in the floor of the mouth and partly in the pharynx. It is the organ of taste and contributes also to chewing, swallowing, and speech.