Body Systems

The ___________ are the main organs of the respiratory system. 

• veins
  
• lungs
• arteries
• kidneys

The ____________________ is the body system that transports oxygen, nutrients, and waste through the body.  

• respiratory system 
• digestive system
• circulatory system 
• immune system

The ____________ is a muscular organ that pumps blood to the body through blood vessels. 

• vein 
• artery 
• heart
• kidney

The ______________________ is the body system that breaks food down so that it can be used by the body.  

• circulatory system 
• digestive system 
• respiratory system 
• skeletal system

What is your body's process of maintaining balanced conditions?

• photosyntheis
• homeostasis
• circulation
• regulation

What is the main function of the respiratory system?

• regulate the body's functions by secreting hormones
• protect the inner organs of the body from harm
• coordinate the actions of the body
• exchange carbon dioxide & oxygen with the environment

The following is an example of which two systems working together:
"The small intestine absorbs nutrients from our food and they are carried through the blood to the cells."

• Digestive and Circulatory
• Digestive and Respiratory
• Digestive and Skeletal
• Digestive and Nervous

Which system works with the Skeletal system to give nutrients to the bones?

• Nervous System
• Digestive System
• Muscular System
• None of the above

Fill in the blanks:
"The ________ system allows us to move around, but the _________ system controls our movement."

• Skeletal, Nervous
• Nervous, Skeletal
• Muscular, Skeletal
• Nervous, Muscular

Alveoli are microscopic air sacs in the lungs of mammals.  Which statement best describes how the structure of the alveoli allows the lungs to function properly?

• they increase the amount of energy transferred from the lungs to the blood.
• they incrase the flexibility of the lungs as they expand during inhalation
• they increase the volume of the lungs, allowing more oxygen to be inhaled
• they incrase the surface area of the lungs, allowing efficient gas exchange