Human Systems

Which structure is the least complex?

• cells

• organs

• tissues

• organ systems

Which structure is the most complex?

• cells

• organs

• tissues

• organ systems

The functional or working unit of the kidney is the ________.

• renal artery
• renal cortex
• nephron
• ureter

What is not a goal of filtering the blood?

• Balancing blood pH

• Maintaining the correct concentration of salts and water in the body

• Removing waste from the blood

• Breaking down digested food

What does the Myelin Sheath protect?

• Axon
• Dendrite
• Cell body
• axon terminal

Which answer correctly names the path of blood through the body?

• Heart-->Lungs-->Body

• Heart-->Body-->Lungs

• Heart-->Lungs-->Heart-->Body

• Heart-->Body-->Heart-->Body

Which blood vessel carries blood away from the heart?

• Artery

• Capillary

• Vein

Which blood vessel contains valves?

• Artery

• Capillary

• Vein

Where does gas exchange take place between the respiratory system and the blood?

• Trachea

• Bronchus

• Alveoli

• Mouth

What is happening with the molecules in the digestive system as you eat breakfast?

• They are getting bigger

• They are breaking down into smaller molecules

• They are turning into mitochondria

• They are performing cellular respiration