In which part of the organ does the parenchyma exist?

The parenchyma refers to the functional portion of an organ, which is responsible for its specific activities and functions. This term is often used to describe the cells and tissues that perform the primary function of the organ, as opposed to the supportive or connective tissues that provide structure.

For example, in the liver, the parenchyma consists of hepatocytes, which are the cells responsible for the organ's metabolic functions, such as detoxification and bile production. Similarly, in the lungs, the parenchyma includes the alveoli, where gas exchange occurs. Understanding this concept is essential in oncology, where the focus is often on the functional aspects of affected tissues and how cancer alters this function.

The other choices describe different components of an organ:

• The supportive framework (stroma) is primarily made up of connective tissues and does not carry out the main functions of the organ.

• Excess tissue surrounding organs can refer to adipose (fat) tissue or other forms of stroma, which again does not have a functional role.

• Connecting tissue is involved in anchoring organs and providing support but does not directly engage in the organ's primary functions.

Recognizing the distinction between these components helps clarify the vital role that parenchyma plays