Tuesday, February 26, 2013

Cardio Respiratory System

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Lesson 6 - The Cardio-Respiratory System
DefinitionsThe cardio-respiratory system consists of the cardio vascular system ( nubble and blood vessels) in concert with respiratory system (lungs and product line ways). These systems work to transport group O to the muscles and organs of the body and remove waste products including carbon dioxide. The HeartThe boob is a double pump. oxygen- paltry blood enters the tone from the vena cava to the near atrium, and flows down to the right ventricle. The first pump pumps oxygen poor blood to the lungs from the right ventricle of the heart via the pulmonary arteria where it returns as oxygen rich blood via the pulmonary mineral vein to the left atrium. It flows through to the left ventricle, where the second pump of the heart pumps the oxygen-rich blood to all the other parts of the body, via the aorta. There argon four valves that ensure blood flows in the correct direction, these atomic number 18 the pulmonary valve, the tricuspid valve, the mitral valve and the aortic valve. | |
The number of time the heart beats per minute, otherwise known as the quiver rate, is affected by the age and fitness of a soul and their current level of activity. The hearts muscle wall is called the myocardium.

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Oxygen for the heart muscle itself is provided by blood vessels wrapped around the come on of the heart, not the blood flowing through it.|
The Heart | |
The Lungs DefinitionsThe remove along lung capacity is approximately 5 litres - this is the maximum pith of air the lungs can contain. The tidal tidy sum is the volume of air breathe in and exhaled during normal breathing and is approximately 500 ml.Residual volume is the volume of the air remaining in the lungs after the maximum amount has been exhaled. It is around 1.5l. The vital capacity is the maximum amount of air that can be exhaled after a maximum intake of breath. Composition of Inhaled and Exhaled AirInhaled Air Nitrogen| 79%|
Oxygen| 20%|
Inert Gases | 1%|
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