Final answer:
The three components of the Monro-Kellie Doctrine are cerebral blood volume, cerebrospinal fluid volume, and brain tissue volume.
Step-by-step explanation:
The Monro-Kellie Doctrine is a principle that states that the total volume inside the skull remains constant. It consists of three components:
- Cerebral blood volume: This refers to the volume of blood in the brain.
- Cerebrospinal fluid volume: This refers to the volume of cerebrospinal fluid that cushions and supports the brain.
- Brain tissue volume: This refers to the volume occupied by the brain tissue itself.
According to the Monro-Kellie Doctrine, any increase in one of these components must be balanced by a decrease in one or both of the other components to maintain a constant intracranial volume.