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The Respiratory System
Transcript of The Respiratory System
The role of the respiratory system
It moves air containing oxygen into your lungs and removes carbon dioxide and water from your body.
the respiratory system make up
Your lungs and the structures that lead to them make up the system.
the process by which the body cells break down glucose, using oxygen and releasing the chemical energy in the glucose. carbon dioxide, a waste we get rid of when we breathe, is a product of cellular respiration.
For oxygen to get into cells, many body systems have to work together. blood (circulatory system) carries oxygen from the respiratory system and glucose from the digestive system to the body cells for respiration.
From the nose, air enters the PHARYNX, or throat, which is connected to the nose and the mouth. From the pharynx, air moves to the TRACHEA, or windpipe. a thin flap of tissue called the epiglottis covers the opening of the trachea to keep food out. when particles irritate the trachea, you cough. Cells that line the trachea have CILIA, tiny hairlike extensions that can move together in a sweeping motion.
going into the system
in the system
air moves from the trachea into the left and right BRONCHI, which are two passages that take air to the lungs. the LUNGS are the main organs of the respiratory system. bronchi branch into smaller tubes in the lungs, and ALVEOLI are at the end of the smallest tubes. These are tiny, thin-walled sacs of lung tissue where gases can move between air and blood
Breathing is controlled by muscles. The lungs are surrounded by the ribs, which have muscles attached to them. at the base of the lungs is the DIAPHRAGM, which is a large, dome-shaped muscle. this is what you use to breathe.
the breathing process
when you breathe, your rib muscles and diaphragm contract, making your chest expand when you inhale. when these muscles relax, your chest contracts as you exhale.
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