Human Body Systems and Cells

How are the pictured organisms different?

• Organism 1 is unicellular while organism 2 is multicellular.
• Organism 2 is unicellular while organism 1 is multicellular.
• Organism 1 can move and organism 2 cannot.
• Organism 2 can move and organism 1 cannot.

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Which organism is unicellular?

• A
• B
• C
• D

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NGSS.MS-LS1-1

Which cell could belong to a leaf?

• only cell Y
• only cell X
• both cell X and cell Y
• neither cell X nor cell Y

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NGSS.MS-LS1-1

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The diagram is what Paula saw while looking under a microscope at some cells. At which organism could Paula be looking?

• a scale from a fish
• a blade of grass
• a hair from a human
• a piece of snakeskin

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NGSS.MS-LS1-1

Which is a single-celled organism?

• A
• B
• C
• D

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NGSS.MS-LS1-1

Which is the name of the organ labeled X on the digestive system diagram?

• esophagus
• intestines
• liver
• Stomach

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To which body system does the human organ labeled X belong?

• digestive
• muscular
• nervous
• respiratory

Where does the exchange of oxygen and carbon dioxide between the air and blood occur in humans?

• nose
• mouth
• esophagus
• lungs

Monica studied the diagram in her science textbook illustrating how two body systems work together. Which two body systems does the diagram represent?

• nervous and respiratory
• circulatory and muscular
• nervous and muscular
• circulatory and respiratory

Two body systems are shown in the diagram. One system detects stimuli and sends messages to the other system regarding touch and contact. The two systems work together to produce movement. Which two major body systems are shown?

• respiratory and digestive systems
• nervous and muscular systems
• muscular and respiratory systems
• circulatory and nervous systems

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