Circulatory System, Respiratory System, Cellular Respiration

When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

Why does your body need to breathe out carbon dioxide?

• Without it, the lungs would not function.
• It can be harmful if it builds up in the bloodstream.
• You need it for your body to survive.
• It is delivered to the heart.

What is the main organ in the respiratory system?

• Kidney
• Heart
• Lungs
• Diaphragm

When you exercise, your heart beats faster to...

• spread oxygen throughout your body more quickly.
• make you feel excited.
• let you know you're working hard.

Oxygen from the air enters the blood stream at what location?

• Cardiac Notch
• Pulmonary Vein
• Alveoli
• Paranasal Sinuses

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body
• to bring oxygen to the body
• to break down food and absorb nutrients
• to remove oxygen from the body and deliver carbon dioxide

As you breathe this contracts and flattens to give your lungs room to fill up with air.

• larynx
• lung balloon
• diaphragm
• heart

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi
• lungs
• oxygen
• alveoli

Within the lungs, the exchange of oxygen and carbon dioxide occurs between the ___ and the capillaries. 

• trachea 
• bronchi 
• alveoli
• diaphragm

When the gasses are exchanged between the alveoli in the lungs and the capillaries, oxygen enters the blood stream. What happens with this oxygen?

• Oxygen in the blood is delivered to the lungs to be exhaled.

• Oxygen in the blood is delivered to the nose to be exhaled.

• Oxygen in the blood is delivered to the tissues and cells of the body to help make energy.

• Oxygen in the blood is a waste that needs to be removed from the boyd.