28 Questions
In the systemic circuit, arteries carry ______ blood to the tissues.
oxygen-rich
In the pulmonary circuit, arteries carry ______ blood to the lungs.
oxygen-poor
Blood vessels are composed of three layers: the ______, the thick smooth muscle wall, and the connective tissue.
endothelium
Capillaries only have two thin layers: ______ and the basement membrane connective tissue.
endothelium
Blood flows from an ______ to an arteriole, then through a network of capillaries to a venule.
artery
The arterioles, capillaries, and venules together are collectively called ______ because you can only see these structures under a microscope.
microcirculation
The human circulatory system consists of two ______: the pulmonary circuit and the systemic circuit.
circuits
In the pulmonary circuit, ______ blood flows to the lungs and then oxygen-rich blood flows back to the heart.
oxygen-poor
Blood from all over the body converges in the ______ atrium.
right
In series blood flow, blood flow happens ______ after the other.
one
Blood must be pumped to the ______ before it goes to the rest of the body.
lungs
The ______ venae cavae carry blood to the right atrium.
superior and inferior
An ______ is a blood vessel that always carries blood away from the heart.
artery
A ______ is a blood vessel that carries blood to the heart.
vein
An ______ is a chamber of the heart that receives blood.
atrium
A ______ is a chamber of the heart that expels blood.
ventricle
The heart is covered and lined with ______ tissue.
epithelial
The ______ of the heart points down and to the left.
apex
Diffusion only works over extremely small _____.
distances
An _____ is a blood vessel that always carries blood away from the heart.
artery
A _____ is a blood vessel that carries blood to the heart.
vein
An _____ is a chamber of the heart that receives blood.
atrium
A _____ is a chamber of the heart that expels blood.
ventricle
The _____ of the heart points down and to the left.
apex
The human circulatory system consists of two _____: the pulmonary circuit and the systemic circuit.
circuits
In the pulmonary circuit, _____ blood flows to the lungs and then oxygen-rich blood flows back to the heart.
deoxygenated
In the systemic circuit, arteries carry _____ blood to the tissues.
oxygenated
The heart is covered and lined with _____ tissue.
epithelial
Learn about the two circuits in the human circulatory system - the pulmonary circuit and the systemic circuit. Understand how oxygen-rich and oxygen-poor blood flows through these circuits in the body.
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