Circulatory System & Respiratory System

Platelets

• protect the liver

• fight infection

• stop bleeding and help wounds heal

Arteries

• flexible, carry blood to the heart

• not flexible, carry blood away from the heart

• flexible, carry blood away from the heart

Red Blood Cells

• carry oxygen

• carry carbon dioxide

• carry proteins

The main function of the circulatory system is 

• To give the body structure and support
• Excrete waste
• transport blood, nutrients, and gases throughout the body
• to transport messages from the body to the brain

The main function of the red blood cells is to 

• allow gases to exchange
• fight infection
• give blood its color
• help clot blood

White blood cells

• allow for gases to exchange
• give blood its color
• fight infection and disease
• help clot blood

The human heart is an organ that pumps blood throughout the body supplying oxygen, nutrients, blood, and hormones to and from the tissues removing _________ ___________ and other wastes.

• hydrogen dioxide
• carbon moxoide
• water molecules
• carbon dioxide

The heart is made up of _________ chambers

• one 
• two 
• three
• four

The upper chambers of the heart are known as...

• valves
• ventricles
• atria
• septum

The lower chambers of the heart are known as...

• valves
• ventricles
• atria
• septum