Human Body Review

Which system functions to transport messages between the brain and other parts of the body?

• respiratory system

• nervous system

• circulatory system

• digestive system

Which of the following statements best describes unicellular organisms?

• Unicellular organisms have transport systems between cells.

• Unicellular organisms have many cells that must work together to perform life processes.

• Unicellular organisms are a single cell that performs all life processes.

• Unicellular organisms live only inside other living organisms.

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Which body system is made up of the following structures: mouth, esophagus, stomach, and intestines?

• digestive system

• muscular system

• respiratory system

• cardiovascular system

Which two body systems function (work together) to help a person walk, run, jump, and swim?

• digestive and muscular systems

• circulatory and respiratory systems

• nervous and digestive systems

• skeletal and muscular systems

What is the function of the cardiovascular system?

• To provide protection to the body’s organs

• To transport needed substances throughout the body and carry away wastes

• To provide movement to body parts

• To break food down into substances the body can use

What is the function of the heart in the circulatory system?

• It pumps blood through vessels throughout the body.

• It helps the body make more blood cells.

• It forms a network of vessels throughout the body.

• It protects the bones of the skeletal system.

Leo is observing a sample of pond water using a microscope. He sees an organism moving around in

the water and thinks it might be a multicellular organism.

Which of the following characteristics of the organism make it most likely to be a multicellular

organism? .

• The organism is made of many cells.

• The organism has cells that perform specialized functions necessary for life.

• The organism has developed transport systems.

• All of the above.

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Which characteristic do single-celled organisms and multicellular organisms have in common?

• Both have cells with specialized functions for each life process.

• Both perform all life processes within one cell.

• Both have a function to get rid of waste materials.

• Both are able to make food from sunlight.

Which example best shows the structures that make up the respiratory system of the human body?

• brain, spinal cord, nerves

• nose, trachea, lungs

• heart, blood, vessels

• esophagus, stomach, intestines

Which statement best describes a unicellular organism?

• It consists of one cell and performs all functions necessary for life within that one cell.

• It contains more than one cell that perform all functions necessary for life.

• It is part of a larger organism, such as a human being.

• It contains differentiated cells that perform all functions necessary for life.

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