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