The Heart & Blood Flow
What organ pumps blood throughout the body?
The Heart
What type of blood vessel carries blood away from the heart?
Arteries
What are two things the circulatory system delivers to body cells?
Oxygen and nutrients
Which side of the heart pumps blood to the lungs?
The right side
What type of blood cell carries oxygen throughout the body?
Red blood cells
Which body system brings oxygen into the lungs?
Respiratory system
Where does blood pick up oxygen before returning to the heart?
The lungs
What are the tiny blood vessels where oxygen, nutrients, and wastes are exchanged with body cells?
Capillaries
Why do your heart rate and breathing rate increase when you exercise?
To deliver more oxygen to working muscles and remove more carbon dioxide.