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