Human Body Systems

Where in the respiratory system does gas exchange occur?

• Heart

• Lungs

• Pharynx

• Trachea

What is the main function of the excretory system?

• Protect the nervous system

• Strengthen skeletal muscles

• Bring oxygen to body cells

• Collect and remove wastes from the body

What substance is brought into the body through the respiratory system?

• Water

• Oxygen

• Carbon Dioxide

• Red blood cells

Which part of the respiratory system resembles branches of a tree?

• Pharynx

• Bronchi

• Trachea

• Epiglottis

Which excretory organ eliminates water and chemical wastes through perspiration?

• Skin

• Liver

• Lungs

• Kidney

Which heart structure prevents blood from flowing backwards?

• Aorta

• Valve

• Septum

• Coronary Artery

Which part of blood carries oxygen to the body cells?

• Plasma

• Platelets

• Red blood cells

• White blood cells

What substance in the mouth contains an enzyme that begins chemical digestion?

• Fiber

• Bile

• Pepsin

• Saliva

What process involves muscle contractions that move food through the esophagus?

• Absorption

• Peristalsis

• Mechanical Digestion

• Elimination

What organ produces/ makes bile?

• Stomach

• Small Intestine

• Liver

• Pancreas