When the chambers of the heart _____ the flood is forced out.
relax
squeeze
The function of capillaries is to...
deliver blood to all the body’s cells
carry blood away from the heart
carry blood back to the heart
The tubes that carry blood throughout every part of the body are called _____.
organs
blood vessels
tendons
cells
Which blood vessels carry blood BACK to the heart?
veins
arteries
What type of organ is the heart?
a joint
a tendon
a ligament
a muscle
When the chambers of the heart ____, they fill up with blood.
squeeze
relax
The heart is part of the _______ system, a network made up of the heart, blood, and blood vessels.
skin
circulatory
muscular
respiratory
_____ is how many times a minute your heart beats.
heart pump
heart beat
pulse
heart dance
Arteries branch off into tiny blood vessels called _______.
capillaries
caterpillars
veins
What body system is the heart a part of?
respiratory system
skeletal system
skin
circulatory system
Which blood vessels carry blood AWAY from the heart?
veins
arteries