Respiratory System and Circulatory System Exam

The function of the respiratory system is to supply the body with _______________ .

• blood

• nutrients

• oxygen

• carbon dioxide

The main organ of the respiratory system are the _________ .

• heart

• lungs

• capillaries

• diaphragm

The ____________ is often called the "wind pipe."

• trachea

• esophagus

• bronchiole

• alveoli

Small blood vessels where oxygen is exchanged for carbon dioxide are called __________ .

• veins

• capillaries

• alveoli

• bronchioles

The ________________ is the large breathing muscle that contracts to create a vacuum, drawing air into the nose and mouth.

• intercostal muscle

• skeletal muscle

• trachea

• diaphragm

The small tubes within the lungs that transport air to the alveoli are called _________ .

• bronchioles

• trachea

• capillaries

• bronchial tubes

The respiratory system removes a harmful waste product called __________ .

• oxygen

• bile

• carbon dioxide

• carbon monoxide

_________ are tiny air sacs in the lungs which are surrounded by capillaries.

• Bronchioles

• Arteries

• Axons

• Alveoli

The human body contains two ____________ which carry air into the lungs.

• trachea

• bronchial tubes

• bronchioles

• capillaries

The diaphragm separates the heart and the lungs from the ___________ .

• skeletal muscles

• brain

• abdominal cavity

• mouth and nose