Muscular System

The muscular system is composed of muscles and tissues that enable movement in the human body. There are three main types of muscles: skeletal, smooth, and cardiac.

Skeletal Muscles

Skeletal muscles are attached to the bones and work in pairs to enable movement. They are under voluntary control and are responsible for actions such as walking, running, and lifting.

Smooth Muscles

Smooth muscles are found in the walls of internal organs, blood vessels, and the digestive system. They are involuntary muscles that control functions like digestion, blood flow, and breathing.

Cardiac Muscles

Cardiac muscles are found in the heart and are responsible for pumping blood throughout the body. They are involuntary muscles that work continuously to maintain circulation.

Study Guide

1. What are the three main types of muscles in the muscular system?
2. Which type of muscles are responsible for voluntary movements?
3. Where are smooth muscles found in the body?
4. What is the function of cardiac muscles?
5. How do skeletal muscles enable movement?