Key Organs and Structures


The brain is the command center of the body, responsible for controlling our thoughts, movements, sensations, and emotions. It consists of different regions that specialize in specific functions, such as the cerebrum for higher-level thinking and the cerebellum for coordination.


The heart is a muscular organ located in the chest that pumps blood throughout the body, delivering oxygen and nutrients to tissues and organs. It has four chambers—two atria and two ventricles—that work together in a coordinated rhythm to circulate blood efficiently.


The lungs are responsible for breathing, exchanging oxygen from the air with carbon dioxide from the blood. They expand and contract with each breath, drawing in oxygen-rich air and expelling carbon dioxide waste.


The liver is the largest internal organ and performs multiple vital functions, including filtering blood, detoxifying chemicals, metabolizing nutrients, and producing bile for digestion.


The kidneys are bean-shaped organs that filter blood to remove waste products and excess substances, producing urine. They also help regulate blood pressure, electrolyte balance, and red blood cell production.

Digestive System

The digestive system processes food and absorbs nutrients to provide energy for the body. It includes organs such as the stomach, intestines, liver, gallbladder, and pancreas, each playing a specific role in digestion and nutrient absorption.

Skeletal System

The skeletal system provides structural support for the body and protects internal organs. It consists of bones, joints, and cartilage, with functions ranging from movement and support to blood cell production and mineral storage.

Muscular System

The muscular system is responsible for movement and stability. It includes three types of muscles—skeletal, smooth, and cardiac—that work together to facilitate movement, maintain posture, and generate heat.