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25 Cards in this Set

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  • Back
The circulatory system
consists of the heart which pumps blood to the tissues the venous system which collects deowygenated blood from the tissues and returns it to the heart and the capillaries, where exchange of gases, nutrients, and wastes takes place
The circulatory system can be divided into two parts 1. is the pulmonary
The pulmonary circulation which moves blood through the lungs and creates a link with the gas exchange function of the respiratory system
Systemic circulation is the second part of the circulatory system
moves blood throughout all the other tissues of the body
The right side of the heart is the
pulmonary arteries, the pumonary capillaries and the pulmonary veins
What is the only artery that carries deoxgenated venous blood?
the pulmonary artery
What is the only vein tha caries oxygenated arterial blood?
the pulmonary vein
Name the two parts of the circulatory system
the low pressure pulmonary circulation, linking circulation and gas exchange in the lungs and the high pressure systemic circulation providing oxygen and nutrients to the tissues
The circulation is a closed system
so the output of the right and left heart must be equal over time for effective functioning of the circulation
The right side of the heart pumps?
blood to the lungs
the left side of the heart pumps?
blood to the systemic circulation
The circulatory system functions as a
transport system that circulates nutrients and other materials to the tissues and removes waste products.
The heart pumps
blood throughout the system and the blood vessels serve as tubes through which blood flows.
the arterial system
carries blood from the heart to the tissues and the veins carry it back to the heart.
the systemic system is served by
the left heart which provides fblood flow for all the tissues except the lungs
the lungs are served by
the right side of the heart and the pulmonary circulation. Blood moves throughout the circulation along a pressure gradient, moving from the high pressure arterial system t the low pressure venous system.
hemodynamics refers to the
the priniples that govern blood flow in the circulatory system.
The most important factors governing the flow of blood in the circulatory system are
pressure, resistance and flow
peripheral vascular resistance or systemic vascular resistance
the collective resistance of all the vessels in that part of the circulation
The rate of blood flow is directly related
to the pressure difference between the two ends of the vessel and the vessel radius and inversely related to vessel length and blood viscosity.
Vessel radius
In addition to pressure and resistance the rate of blood flow through a vessel is affected by the fourth power of its radius. (the radius multiplied by itself four times.) If the radius of 2 mm will be 16 times greater than in vessel a with a radius of 1
The heart
is a four chambered pump consisting of two atria the rt atrium which received blood returning to the heart from the systemic circulation
the lt atria
which receives oxygenated blood from the lungs
the rt atria
which receives blood returning to the heart from the systemic circulation
the rt ventricle
which pumps blood to the lungs
the left ventricle
which pumps blood into the systemic circulation