R e s p i r a t o r y S y s t e m. Missy Gaulke Brittany Affinito. W h a t i s t h e r e s p i r a t o r y s y s t e m ?.
The trachea is a pipe shaped by rings of cartilage. It divides into two tubes called bronchi. These carry air into each lung. Inside the lung, the tubes divide into smaller and smaller tubes called bronchiolies. At the end of each of these tubes are small air balloons called alveoli.
First, the body breathes in the air which is sucked through the nose or mouth and down through the trachea.
Upper respiratory: nose, phaynx
Lower respiratory: larynx, trachea, bronchi, and lungs.
Within the lungs, the trachea branches into a left and right bronchus, which divide into increasingly smaller branches called bronchioles. The smallest bronchioles end in a cluster of air sacs, collectively called an acinus. The acinus comprises individual air sacs called alveoli. Alveoli are like small balloons that inflate and deflate with air during respiration.
Gas exchange occurs in the lungs between the alveoli and a capillary network within the alveolar wall. Capillaries are microscopic blood vessels that exchange material between the blood and body tissues. In the lung capillaries, blood from tissues where cellular metabolism is occurring is called deoxygenated blood because it contains many carbon dioxide molecules and few oxygen molecules.
The respiration process has two parts: inspiration (inhaling) and expiration (exhaling). During inspiration, the diaphragm contracts, moves downward, and causes the thoracic cavity volume to increase. Because the lungs are closely associated with the interior chest wall, they expand as the thoracic cavity expands. When the diaphragm relaxes (upward position), the thoracic volume decreases and the lungs partially deflate. This process is called expiration. The elastic recoil of the expanded thoracic wall and lungs also helps expiration.
After inhalation, the alveoli contain many oxygen molecules. The alveoli are in close contact with the capillary network. This proximity enables the minuscule oxygen molecules to diffuse (pass freely) from the alveolus to the bloodstream, flowing from a region of higher concentration to a region of lower concentration. In the bloodstream, the oxygen attaches to red blood cells and is transported to the rest of the body. Likewise, carbon dioxide diffuses from the bloodstream into the alveolus where it is transported out of the body during exhalation.
During respiration, the pleurae (pleural membranes) help the lungs to expand and contract. These membranes are sacs that tightly cover the lungs and the chest inside wall. Between these two linings is a space called the pleural cavity that contains a thin layer of fluid. This fluid allows the lungs to move freely against the thoracic cavity inside.
The average person breathes in the equivalent of 13 pints of air each minute.
People yawn because the brain detects low levels of oxygen in the lungs and triggers the response so the body will intake a large amount of oxygen.
Guinness World Records lists Charles Osborne from Anthon, Iowa as a record-holder for hiccupping. He hiccupped for 68 years.
Hiccups are sudden, involuntary contractions of the diaphragm muscle. As the muscle contracts repeatedly, the opening between your vocal cords snaps shut to check the inflow of air and makes the hiccup sound. Irritation of the nerves that extend from the neck to the chest can cause hiccups.
Hiccups are caused by several things, and are the product of spasms, or sudden movements, in the diaphragm. Eating too fast is one common cause of hiccups.
Why Do I Yawn? When you are sleepy or drowsy the lungs do not take enough oxygen from the air. This causes a shortage of oxygen in our bodies. The brain senses this shortage of oxygen and sends a message that causes you to take a deep long breath---a YAWN.
Every minute we breathe, we take in 13 pints of air! That is we breathe about 6.15 liters of air every minute.