Page 43 - Physiology and Pathophysiology MNU 2024-2025 نظرى

Clinical pharmacy 2024/2025 Level 2 Pharm D Physiology and Pathophysiology (MD303)

II. Central Nervous system

1) Brain

*The brain constitutes about one-fifth of the body weight and lies within

the cranial cavity.

1. Cerebrum (cerebral cortex).

Parts 2. Cerebellum.

3. The brain stem [Midbrain - Pons- Medulla oblongata.]

 The brain receives about 15% of the cardiac output (COP),

Blood approximately 750 ml of blood per minute.
 Blood flow in the brain has its own circulation called circulus arteriosus.
flow
 Keeps blood flow to the brain constant by adjusting the diameter of the

arterioles By Vasoconstriction and Vasodilation

Membranes covering the brain and spinal cord (the meanings)

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