Muscular System

The muscular system is a network of tissues that controls movement throughout the body. There are three main types of muscles: skeletal, smooth, and cardiac.

Skeletal Muscles

Skeletal muscles are attached to the bones and are responsible for voluntary movements such as walking, running, and lifting. They are striated, meaning they have a striped appearance under a microscope.

Smooth Muscles

Smooth muscles are found in the walls of internal organs, blood vessels, and the digestive system. They are responsible for involuntary movements such as the contraction of the stomach and blood vessels. Unlike skeletal muscles, smooth muscles are not striated.

Cardiac Muscles

Cardiac muscles are found in the heart and are responsible for pumping blood throughout the body. They are striated like skeletal muscles but are involuntary like smooth muscles.

Study Guide

1. What are the three main types of muscles? Describe each type.
2. What is the function of skeletal muscles?
3. Where are smooth muscles found in the body?
4. What is the function of cardiac muscles?
5. What is the difference between skeletal and smooth muscles?

[Muscular System] Related Worksheets and Study Guides:

• Human bodyScience • First Grade