Which is not in the circulatory system?
Heart
Valves
Vein
Ovary
When the chambers of the heart ____, they fill up with blood.
relax
squeeze
Arteries branch off into tiny blood vessels called _______.
caterpillars
veins
capillaries
When the chambers of the heart _____ the flood is forced out.
relax
squeeze
What type of organ is the heart?
a muscle
a ligament
a tendon
a joint
The tubes that carry blood throughout every part of the body are called _____.
tendons
blood vessels
organs
cells
_____ is how many times a minute your heart beats.
pulse
heart pump
heart beat
heart dance
Which blood vessels carry blood AWAY from the heart?
veins
arteries
Which blood vessels carry blood BACK to the heart?
arteries
veins
What body system is the heart a part of?
circulatory system
skin
respiratory system
skeletal system
The function of capillaries is to...
deliver blood to all the body’s cells and connect arteries and veins.
The heart is part of the _______ system, a network made up of the heart, blood, and blood vessels.
circulatory
respiratory
muscular
skin
How thick are artery walls?
Very thick