Heart, blood circulation

The circulatory system consists of what three parts?

• Heart

• Brain

• Blood

• Blood vessels

• Liver

Why human is considered to have a double circulatory system?

• Blood enters the heart twice in a circulation

• Human has only single circulation

• Human has closed blood vessels

• Human has two atria and two ventricles

Identify

• Left atrium
• Right atrium
• Left ventricle
• Right ventricle

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

what does an atrium do

• let blood in

• let blood out

• exchange gases

• remove waste

Identify

• Left atrium
• Right atrium
• Left ventricle
• Right ventricle

how is blood pressure created

• force of blood against artery wall

• force of blood in the heart

• force of blood in the lungs

• force of blood in the goodwin