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Transcript of Respiritory System
By Beth and Cole
Lungs Bronchiole tubes, Alveoli and Bronchus
The nasal cavity is a hollow space within the nose and skull that is lined with hairs and mucus membrane. The function of the nasal cavity is to warm, moisturize, and filter air entering the body before it reaches the lungs.
When you breathe
When you breath in, your rib cage expands and your lungs fill with oxygen. Oxygen is then sent to your blood stream. When you exhale Carbon dioxide moves from the blood flowing through the blood vessels into the alveoli. The diaphragm moves up to help the chest push the carbon dioxide out of the lungs.
Every cell in the body needs oxygen to function and the
supplies that oxygen.
The pharynx, or throat, is the passageway leading from the mouth and nose to the esophagus and larynx. The pharynx permits the passage of swallowed solids and liquids into the esophagus, and conducts air to and from the trachea, or windpipe, during respiration.
It is protected by cartilage. The cartilage arches out at the front, and is called the Adam's apple. When you breathe in through the nose or mouth, air travels through the larynx, down the windpipe, and then into the lungs. The larynx contains two bands of muscle called vocal cords. The larynx is also called the "voice box".
The trachea, commonly known as the windpipe, is a tube about 4 inches long and less than an inch in diameter in most people. The trachea begins just under the larynx and runs down behind the sternum. The trachea then divides into two smaller tubes called bronchi: one bronchus for each lung.
The trachea is composed of about 20 rings of tough cartilage. The back part of each ring is made of muscle and connective tissue. Moist, smooth tissue called mucosa lines the inside of the trachea. The trachea widens and lengthens slightly with each breath in, returning to its resting size with each breath out.
Bronchi are the main passageway into the lungs. When someone takes a breath through his nose or mouth, the air travels into the larynx. The next step is through the trachea, which carries the air to the left and right bronchus. The bronchi become smaller the closer they get to the lung tissue and are then considered bronchioles.
System in Use
Close up picture of whole resporitory system
The bronchioles lead to tiny air sacs known as alveoli. The alveoli are richly supplied with capillaries where the exchange of gases takes place between the red blood cells and the alveoli.
Our lungs bring fresh oxygen into our bodies and remove carbon dioxide and other gas waste products. As we breathe air in, we use the muscles of our rib cage and especially the major muscle called the diaphragm to pull air into our lungs. As we breathe air in, the diaphragm contracts or tightens and flattens, allowing air to be sucked into the lungs.
The lungs are the main organs of the respiratory system. In the lungs oxygen is taken into the body and carbon dioxide is breathed out. The red blood cells are responsible for picking up the oxygen in the lungs and carrying the oxygen to all the body cells that need it.
A red protein in red blood cells responsible for transporting oxygen in the blood. It delivers oxygen to your tissues, and takes carbon dioxide to the lungs to be exhaled.
The red blood cells drop off the oxygen to the body cells, then pick up the carbon dioxide which is a waste gas product produced by our cells. The red blood cells transport the carbon dioxide back to the lungs and we breathe it out when we exhale.