Body Systems Quiz

What is the primary function of the respiratory system?

• To digest food

• To circulate blood

• To exchange gases (oxygen and carbon dioxide)

• To support the body structure

Which organ is responsible for pumping blood throughout the body in the circulatory system?

• Lungs

• Heart

• Liver

• Kidneys

What type of muscle is the heart made of?

• Smooth muscle

• Skeletal muscle

• Cardiac muscle

• Elastic muscle

How many bones are in the adult human body?

• 206

• 305

• 150

• 265

What is the main function of the digestive system?

• To pump blood

• To exchange gases

• To break down food into nutrients

• To move the body

Which of the following is the correct sequence in the levels of organization from smallest to largest?

• Cells, tissues, organs, organ systems, organism

• Tissues, cells, organs, organism, organ systems

• Organ systems, organs, tissues, cells, organism

• Organism, organ systems, organs, tissues, cells

What is the primary gas exchanged by the lungs in the respiratory system?

• Nitrogen

• Oxygen

• Carbon dioxide

• Hydrogen

Which component of blood carries oxygen to the body's cells?

• White blood cells

• Platelets

• Plasma

• Red blood cells

Which type of muscle is found in the walls of internal organs such as the stomach?

• Cardiac muscle

• Skeletal muscle

• Smooth muscle

• Fibrous muscle

What is the largest bone in the human body?

• Femur

• Tibia

• Spine

• Humerus