The circulatory system is made up of..

• heart, blood, capillaries
• heart, blood, plasma
• heart, blood, blood vessels 
• Heart, blood, lungs

Platelets

• help fight disease
• take up oxygen and deliver to cells 
• help form blood clots 
• help carries nutrients

White blood cells

• help fight disease
• take up oxygen and deliver to cells 
• help form blood clots 
• helps carry nutrients

Red blood cells 

• help fight disease
• take up oxygen and deliver to cells 
• help form blood clots 
• are the liquid part of blood

Carry blood away from heart; mostly oxygen-rich

• Arteries
• Veins
• Capillaries

Blood vessels that carry oxygen poor blood to the heart are 

• veins
• arteries
• capillaries

What is something both the arteries and veins do?

• Transport Blood
• have thicker walls
• Bring blood away from the heart
• Study for Science tests

What does blood transport?

• Oxygen 
• All of the answers provided are transported in blood
• wastes
• nutrients

The little air sacs in the lungs that are covered by capillaries.

• veins
• alveoli 
• platelets
• plasma

These blood vessels allow for the diffusion of substance across their membranes.

• veins
• platelets
• ventricles
• capillaries