In biology, an organ or viscus is a collection of tissues joined in a structural unit to serve a common function. source
In biology, an organ or viscus is a collection of tissues joined in a structural unit to serve a common function.
In anatomy, a viscus is an internal organ, and viscera is the plural form. source
In anatomy, a viscus is an internal organ, and viscera is the plural form.
Organs are composed of main tissue, parenchyma, and "sporadic" tissues, stroma. source
Organs are composed of main tissue, parenchyma, and "sporadic" tissues, stroma.
The main tissue is that which is unique for the specific organ, such as the myocardium, the main tissue of the heart. source
The main tissue is that which is unique for the specific organ, such as the myocardium, the main tissue of the heart.
Functionally related organs often cooperate to form whole organ systems. source
Functionally related organs often cooperate to form whole organ systems.
Organs exist in all higher biological organisms, in particular they are not restricted to animals, but can also be identified in plants. source
Organs exist in all higher biological organisms, in particular they are not restricted to animals, but can also be identified in plants.
In single-cell organisms like bacteria, the functional analogue of an organ is called organelle. source
In single-cell organisms like bacteria, the functional analogue of an organ is called organelle.
A hollow organ is a visceral organ that forms a hollow tube or pouch. source
A hollow organ is a visceral organ that forms a hollow tube or pouch.
The functions of organ systems often share significant overlap. source
The functions of organ systems often share significant overlap.
For instance, the nervous and endocrine system both operate via a shared organ, the hypothalamus. source
For instance, the nervous and endocrine system both operate via a shared organ, the hypothalamus.
Mammals such as humans have a variety of organ systems. source
Mammals such as humans have a variety of organ systems.
The organ level of organisation in animals can be first detected in flatworms and the more advanced phyla. source
The organ level of organisation in animals can be first detected in flatworms and the more advanced phyla.
The less-advanced taxons (like Placozoa, Porifera and Radiata) do not show consolidation of their tissues into organs. source
The less-advanced taxons (like Placozoa, Porifera and Radiata) do not show consolidation of their tissues into organs.
Organs of plants can be divided into vegetative and reproductive. source
Organs of plants can be divided into vegetative and reproductive.
The English word "organ" derives from the Latin organum, meaning "instrument", source
The English word "organ" derives from the Latin organum, meaning "instrument",
