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Cardiovascular System

You can use the reading assignments from Anatomy and Physiology made Incredibly Easy, if you need some help! 
Across
Blood travels to the lungs to pick this up.
This type of circulation occurs when blood travels to the lungs to pick up oxygen and release carbon dioxide.
The major artery that branches into vessels that supply specific organs and areas of the body.
This system is made up of the heart, blood-vessels, and lymphatics.
The heart is about the size of a closed _______.
The human body has nearly 60,000 miles of blood __________.
The cardiac cycle has two phases: _________ and diastole.
The normal pacemaker of the heart.
Down
_______ of the heart, occurring as a result of its conduction system, causes blood to move throughout the body.
The _______ cycle is the period from the beginning of one heartbeat to the beginning of the next.
The outer layer of the heart made up of squamous epithelial cells overlying connective tissue.
As a normal part of aging, the heart usually becomes slightly ____________.
The __________ valve has three triangular cusps, or leaflets.
How many types of blood vessels in the body?
The heart contains two ventricle and two _________.