Lesson 4 - How Do Our Bodies Move, Breathe, and Circulate Blood?

Human organs and organ systems each have specific functions, or jobs. Which pairing matches an organ with its main function?

• biceps: structure

• jawbone: balance

• lung: removal of oxygen

• vein: carrying away wastes

The following picture shows the human circulatory system.

What is the function of the organ marked x?

• to filter blood

• to pump blood

• to add oxygen to the blood

• to remove carbon dioxide from the blood

The movement of legs allows people to walk. Which three body systems work together closely to give the legs movement?

• muscular, nervous, and skeletal

• digestive, muscular, and respiratory

• circulatory, digestive, and muscular

• circulatory, digestive, and respiratory

Body systems work together to supply cells with nutrients. Which list shows the path nutrients take in the body?

• air - respiratory system - digestive system - cells

• air - respiratory system - circulatory system - cells

• food - digestive system - circulatory system - cells

• food - digestive system - respiratory system - cells

The human skeletal system provides structure and support for the body. The following picture shows the basic structures of a plant.

Which plant structure is most similar in function to the human skeletal system?

• A. Flowers

• B. Leaves

• C . Stems

• D. Roots

Inside bones is a spongy layer called ___________ where blood cells are found.

• pivot joint

• marrow

• Ligaments

• tendons

The organ system that supports and protects the body, stores minerals and allow movement.

• Circulatory

• Digestive

• Muscular

• Skeletal

The place where two or more bones meet is a __________. An example of this is your knee or your elbow.

• tendon

• ligament

• marrow

• joint

The organ system that carries blood through your body. It consists of the heart, blood vessels, and blood.

• muscular

• skeletal

• circulatory

• respiratory

This part of your blood help you stop bleeding by sticking together and forming clots.

• platelets

• red blood cells

• white blood cells

• Plasma