Circulatory system Flashcards
(30 cards)
vascular organ function
transport of substances & second defense
it is a muscular organ that functions as a pump
heart
heart structure
atria & ventricle
3 layers of the heart wall
endocardium, myocardium & epicardium
creates the force that starts the movement of blood
heart
covers all of the
structures within the heart chambers, including the valves
endocardium
Loose CT that contains Purkinje fibers, small blood vessels and nerves
Subendocardial layer
the middle and thickest layer
myocardium
lies between the muscle and the neighboring pericardial cavity
epicardium
is composed of a single layer of a specialized simple squamous
epithelium called endothelium that lies on a basement membrane.
Tunica intima
Contains variable amounts of collagen,
proteoglycans, and elastic fibers
Tunica media
blood vessel that conducts blood away from the heart.
Artery
3 types of arteries
elastic, muscular and arterioles
Also known as conducting artery
Elastic Artery
cells that accumulate
lipid with ageing, and
the intima layer
thickens, one of the
first signs of
atherosclerosis.
Myointimal cells
Also known as distributing artery
Muscular Artery
referred to as resistance vessels
Arterioles
smallest arteries just before they turn into capillaries
Arterioles
blood vessel that conducts blood toward the heart
Veins
a short microvessel in the
microcirculation that links arterioles and capillaries.
Metarterioles
responsible for carrying oxygen rich blood from the lungs to
the heart.
Pulmonary veins
carry deoxygenated blood from the rest of the body back to
the heart
Systemic veins
veins that lie near the skin’s surface and lack corresponding arteries
Superficial
found within muscle tissue and do have a corresponding artery
deep veins
