Human Body Systems

Which system functions primarily to coordinate the body’s response to changes in its internal and external environment?

• digestive system

• excretory system

• nervous system

• skeletal system

Which of the following is a component of the circulatory system?

• heart

• blood vessels

• blood

• all answers

The system that is responsible for the production of gametes is the

• excretory system

• reproductive system

• nervous system

• integumentary system

Muscle tissue functions to move 

• blood. 
• food in the digestive tract. 
• bones. 
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Organs that work together form 

• connective tissues. 
• tissue systems. 
• organ systems. 
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The functions of the skin include 

• defense against microbes. 
• regulation of body temperature. 
• prevention of dehydration. 
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The system that recognizes and attacks foreign substances is known as the 

• integumentary system 
• immune system 
• digestive system 
• nervous system 

Which of the following is a function of both the excretory system and the digestive system? 

• regulating metabolism 
• eliminating wastes 
• regulating other organ systems 
• maintaining homeostasis 

The system that involves the skin as a primary structure is called __________________. 

• integumentary system 
• digestive system 
• muscular system 
• endocrine system 

The heart and the blood vessels are separate organs that form the 

• skeletal system. 
• cardiovascular system. 
• reproductive system. 
• digestive system.