Top anatomy diagrams including images of human anatomy systems, human body, organs, bones and muscles
Organ, in biology, a group of tissues in a living organism that have been adapted to perform a specific function. In higher animals, organs are grouped into organ systems; e.g., the esophagus, stomach, and liver are organs of the digestive system. Learn
Many entries describe the body’s major structures. For example,seeabdominal cavity;adrenal gland;aorta;bone;brain;ear;eye;heart;kidney;large intestine;lung;nose;ovary;pancreas;pituitary gland;small intestine;spinal cord;spleen;stomach;testis;thymus;thyroid gland;tooth;uterus; andvertebral column. ...
Reinier de Graaf was a Dutch physician who discovered the follicles of the ovary (known as Graafian follicles), in which the individual egg cells are formed. He was also important for his studies on the pancreas and on the reproductive organs of mammals.