muscles

Muscles

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Muscles

Bones, joints and muscles make up the locomotor system.

Muscles are flexible and elastic.

Locomotor system

Muscles

-In our body, we have more than 600 bones.

-Muscles work in pairs, when one muscle contracts, the other one relaxes.

relaxed

contracted

Muscles

They are attached to the bones by tendons

gluteal muscles

intercostals

neck muscles

Quiz• 1. What attaches the muscles to the bones, tendons or

joints?• 2. Are muscles hard and rigid or flexible and elastic?• 3. This muscle is in the arm. Is it the biceps or the

quadriceps?• 4. These muscles are in the trunk. They are between the

ribs. Are they the intercostal or the pectoral muscles?• 5. Do muscles work on their own or in pairs?• 6. When one muscle in a pair contracts does the other

muscle contract too or relax?

Answers

• 1.Tendons

• 2. Flexible and elastic.

• 3. The biceps.

• 4. Intercostal muscles

• 5. In pairs.

• 6. The other one relaxes.

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