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