Unit 3 Lesson 5

What is the primary function of the muscular system?

• To produce blood cells

• To provide movement and support

• To digest food

• To circulate blood

What does the word "voluntary" mean as used in the lesson?

•  Involuntary or automatic

• Done consciously or with control

• Uncontrollable

• Unconscious

Why are muscles considered essential for movement?

• They protect the heart.

• They provide the force needed to move bones.

• They aid in digestion.

• They pump blood.

Which function is NOT performed by the muscular system?

• Providing movement

• Supporting the body's structure

• Producing energy

• Protecting organs

Select two types of muscles found in the body.

• Cardiac muscles

• Skeletal muscles

• Digestive muscles

• Nervous muscles

Which two sentences from the lesson best support the idea that muscles are essential for movement?

•  "Muscles are attached to bones by tendons."

• "Voluntary muscles are controlled consciously."

• "Involuntary muscles work automatically."

•  "Muscles provide the force needed to move bones."