LS.5.2.2 Body Systems and Their Functions

Which body systems work together when you exercise?

• Muscular, skeletal, circulatory, and respiratory systems.

• Nervous, endocrine, digestive, and immune systems.

• Integumentary, lymphatic, urinary, and reproductive systems.

• Cardiovascular, muscular, skeletal, and digestive systems.

What is the main function of the digestive system?

• To break down food so the body can absorb nutrients.

• To circulate blood throughout the body.

• To provide structural support to the body.

• To regulate body temperature.

What is an involuntary muscle?

• A muscle you can control, like your arm muscles.

• A muscle that is under conscious control, like your leg muscles.

• A muscle you cannot control, like your heart or stomach muscles.

• A muscle that only works during exercise.

What is the main function of the muscular system?

• To help the body move and support its shape.

• To protect internal organs from injury.

• To store energy for future use.

• To produce hormones that regulate metabolism.

What is the main function of the respiratory system?

• To circulate blood throughout the body.

• To bring oxygen into the body and remove carbon dioxide.

• To digest food and absorb nutrients.

• To regulate body temperature.

What is a voluntary muscle?

• A muscle you can control, like your arm or leg muscles.

• A muscle that works automatically without conscious control.

• A muscle that is only found in the heart.

• A muscle that is always contracted.

What is the main function of the nervous system?

• To send messages between the brain and the body.

• To produce hormones that regulate bodily functions.

• To filter toxins from the blood.

• To provide structural support to the body.

What is the difference between voluntary and involuntary muscles?

• Voluntary muscles are found in the heart; involuntary muscles are found in the limbs.

• Voluntary muscles move automatically; involuntary muscles move when you choose.

• Voluntary muscles are under conscious control; involuntary muscles move automatically.

• Voluntary muscles are only found in skeletal tissue; involuntary muscles are only found in smooth tissue.

How do the circulatory and respiratory systems work together?

• The respiratory system brings in oxygen, which the circulatory system delivers to cells, and removes carbon dioxide from the body.

• The circulatory system filters blood, while the respiratory system regulates body temperature.

• The respiratory system transports nutrients, and the circulatory system removes waste products.

• The circulatory system absorbs oxygen directly from the air, while the respiratory system circulates blood.

What is the main function of the circulatory system?

• To move blood, oxygen, and nutrients through the body.

• To digest food and absorb nutrients.

• To protect the body from infections and diseases.

• To regulate body temperature and maintain homeostasis.