Muscles work closely with our bones and connective tissues in order to make our body move.
There are three types of muscles in the body:
Muscles are attached to bones by tough cords of connective tissue called tendons.
There are around 650 muscles in the human body. This number only refers to the muscles that have been named — mostly skeletal muscles — and do not include countless nameless smooth muscles.
Muscles work by becoming shorter or contracting. When muscles contract, they pull on the tendons that connect them to bones. When the tendons are pulled, they also pull on the bones to which they are attached. This creates movement.
Muscles can only pull. They cannot push. For this reason, muscles need to work in pairs, so that bones can move in opposite directions.
The biceps and triceps muscles in the upper arm are an example of a pair of muscles that work to create movement in opposite directions. They work on the elbow joint to move the forearm.
Protein is the building block of muscle tissue, so you need to have enough protein in your diet to keep your muscles healthy. You can do this by eating food rich in protein, such as (but not limited to) meat, fish, beans, eggs, and milk.
Exercising your muscles make them stronger.
There are several types of injuries that can happen to your muscles.
First aid for soft tissue injuries like muscle injuries is known by the acronym R.I.C.E.
The worksheets below are interactive “live worksheets” — they can be answered and corrected/submitted right on this page.
Printable (PDF) versions of these worksheets are also available for free download — just click on links provided before each worksheet.
Note on the Worksheets
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A printable version of this worksheet can be downloaded here: Introduction to The Muscular System: Worksheet for Kindergarten to Grade 2 PDF
A printable version of this worksheet can be downloaded here: Types of Muscles: Muscular System Worksheet for Grade 3 PDF
A printable version of this worksheet can be downloaded here: How the Muscular System Works: Fill in the Blanks Worksheet for Grade 4 PDF
A printable version of this worksheet can be downloaded here: How the Muscular System Works: Multiple Choice Worksheet for Grade 5 PDF
A printable version of this worksheet can be downloaded here: Muscle Types and Injuries: Muscular System Worksheet for Grade 6 PDF