Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which car...
All blood vessels leading from the heart are called
What's the difference between
Jun 22, 2015
A BBC Bitesize secondary school revision resource for Standard Grade Biology
on need for energy: lungs, gas exchange, heart,
Explore the anatomy of the human cardiovascular system (also known as the circulatory system) with our detailed diagrams and information.
According to The Franklin Institute, there are three types of blood vessels, each
with its own function.
Jul 25, 2014
Learn some important differences between
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