Body Systems

Blood vessels carry nutrients (like glucose) and oxygen to the muscle cells that need them. Blood vessels take away carbon dioxide and waste from muscle cells.

• Respiratory

• Cardiovascular

• Nervous

• Digestive

• Muscular

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The brain checks up on the amount of carbon dioxide in the blood and adjusts the rate of breathing. The brain “communicates” with the lungs using nerves from the brain to lungs.

• Respiratory

• Cardiovascular

• Nervous

• Digestive

• Skeletal

Blood vessels carry red blood cells to the lungs, to get rid of carbon dioxide and pick up oxygen that has been breathed in. The heart pumps red blood cells carrying oxygen from lungs to all cells in the body and back to the lungs once the oxygen has been used up. 

• Respiratory

• Cardiovascular

• Nervous

• Digestive

• Skeletal

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Blood vessels deliver nutrients and oxygen for all the intestinal cells to function. Blood in blood vessels picks up nutrients absorbed by the intestines and carries them away to other parts of the body that need them.

• Respiratory

• Cardiovascular

• Nervous

• Digestive

• Skeletal

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Nerves send messages to muscles to tell them how and where to move. Nerves check up on the body’s need for oxygen in the muscles and adjust breathing rate and heart rate as needed.

• Respiratory

• Cardiovascular

• Nervous

• Digestive

• Muscular

The brain tells the stomach, intestines, and liver when to be active and when to rest. Messages to and from the brain decide when it’s time to process food.

• Respiratory

• Cardiovascular

• Nervous

• Digestive

• Muscular

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In which ways is a nerve cell in a human different from a bacteria cell?

• The nerve cell works alone, and the bacterial cell works in a group

• The nerve cell has one specific job, and the bacterial cell has many.

• The nerve cell contains tiny structures, and the bacterial cell does not.

• The nerve cell is a unicellular organism, and the bacterial cell is not.

In what ways are the digestive and circulatory systems alike?

• Both protect organs in the body.

• Both control movement in the body.

• Both absorb gases or nutrients into the body.

• Both provide structural support for hte body.

Which system in the human body includes the heart, blood, arteries and veins?

• cardiovasular

• digestive

• muscular

• respiratory

In what ways are the circulatory system and the nervous system similar?

• They both perform the same function.

• They are both structural systems.

• They are both transport systems.

• They both involve the same organs.

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