Smart Doctor on Instagram‎: "Nervous and Circulatory System. 🧠♻️🫀 . . The human brain is a complex and intricate organ, often likened to a sophisticated LEGO model due to its modular structure and multifunctional components. Here’s a breakdown of its main parts and functions 1. Major Regions of the Brain Cerebrum Structure Largest part of the brain, divided into two hemispheres. Function Responsible for higher functions such as thought, learning, and voluntary movement. Contains lobes Frontal