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This article contains a list of organs in the human body. It is widely believed that there are 79 organs (this number goes up if you count each bone and muscle as an organ on their own, which is becoming a more common practice [1] [2]); however, there is no universal standard definition of what constitutes an organ, and some tissue groups' status as one is debated. [3]
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An organ system is a biological system consisting of a group of organs that work together to perform one or more functions. [1] Each organ has a specialized role in an organism body, and is made up of distinct tissues .
The kiwi lays the largest egg of any bird relative to its size – up to a quarter of the mass of the female. Viperfish have the largest teeth of any fish relative to its size. Shrews have the largest brain-to-body mass ratio of any animal, with brains that are 10% of body weight. Humans however have the largest encephalization quotient of any ...
While you can't visit the cubs right now (they're still too small!), you can see so many other amazing animals at the Fresno Chaffee Zoo. Like other African Lions! Like other African Lions!
A wheeled buffalo figurine—probably a children's toy—from Magna Graecia in archaic Greece [1]. Several organisms are capable of rolling locomotion. However, true wheels and propellers—despite their utility in human vehicles—do not play a significant role in the movement of living things (with the exception of certain flagella, which work like corkscrews).
The mammalian kidney is the organ that has the most complex vascular blood system compared to other organs. [105] Despite their small size, the kidneys of mammals account for a significant part of the minute volume of blood circulation. [ 106 ]
Scientists think genetically-modified animals could one day be the solution to an organ supply shortage that causes thousands of people in the U.S. to die every year waiting for a transplant.