The Respiratory System

By: Shriya Iyer

What is your/ the respiratory system?

The respiratory system is made up of organs and tissues that help you breathe. The main parts of this system are the airways, the lungs and linked blood vessels, and the muscles that enable breathing.

http://www.nhlbi.nih.gov/health/health-topics/topi...

What are your lungs, and how do they work/ interact with your breathing?

The lung is the essential respiration organ in many air-breathing animals, including most tetrapods, a few fish and a few snails. Inmammals and the more complex life forms, the two lungs are located near the backbone on either side of the heart. Their principal function is to transport oxygen from the atmosphere into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere.

http://en.wikipedia.org/wiki/Lung

What is your airway, and how does it work/ interact with your breathing?

Your airway is the passage in which the breath you inhale takes. Asthma patients have a smaller opening in their airway which makes it more difficult to breathe, thus the term wheezing, which is a strained effort to deliver oxygen to the parts of the body.

Here is a brief video, which informs you about your respiratory system, its parts, its functions, and more.

Why do you yawn? Is it contagious? Do medical issues affect your yawning?

Meet your lungs!



11 Amazing Facts About Your Respiratory System!!!

1. Breathing allows you to take in the oxygen your cells need and expel carbon-dioxide waste. But when you exhale, you also breathe out a lot of water.When at rest, humans exhale up to 17.5 milliliters (0.59 fluid ounces) of water per hour, according to a 2012 article in the journal Polish Pneumonology and Allergology. But you lose about four times that amount when you exercise, the study said.

2. Some people can hold their breath for more than 20 minutes. The average time an adult can hold his or her breath is between 30 and 60 seconds. This limitation has more to do with the buildup of blood-acidifying carbon dioxide than the lack of oxygen, which your body stores in muscle proteins called myoglobin. But free divers — people who practice the sport of diving underwater without using equipment like scuba gear — have different techniques, such as hyperventilation, to decrease the concentration of carbon dioxide in the blood, allowing them to hold their breath for remarkably long times. Denmark's Stig Severinsen currently holds the Guinness World Record for the longest free dive — in 2010, he held his breath underwater for 22 minutes.

3. Lungs are the only organs which can float on water. Each of your lungs contains about 300 million balloon-like structures called alveoli, which replace the carbon-dioxide waste in your blood with oxygen. When these structures are filled with air, the lungs become the only organs in the human body that can float on water.In fact, medical examiners use the so-called "lung float test" during autopsies to determine if a baby was stillborn (died in the womb). If the lungs float, the baby was born alive; if the lungs don't float, the baby was stillborn. This method is accurate 98 percent of the time, according to a 2013 study in the International Journal of Legal Medicine.

4. Sneeze particles don't travel as fast as people may think. In the past, modeling studies have estimated the velocity of a sneeze at 112 mph (180 km/h). On the popular Discovery Channel series "MythBusters," hosts Jamie Hyneman and Adam Savage recorded a maximum sneeze velocity of 39 mph (63 km/h). However, a 2013 study in the journal PLOS ONE found that a sneeze's maximum velocity is even lower than the rates determined on "MythBusters." Using a high-speed camera and LED lights, the researchers found that their study participants only sneezed up to 10 mph (16 km/h).

5. The common cold can be caused by millions of viruses. The common cold is by far the most prevalent respiratory-system illness, and may be the most common illness known today. It is the leading cause of doctor visits, as well as missed days from work and school, according to the Centers for Disease Control and Prevention. In the United States alone, there are more than 1 billion cases of the common cold each year. A cold is often thought to be synonymous with "rhinovirus," the virus that most frequently causes this type of illness. But there are actually more than 200 viruses that can cause a cold, including the human coronavirus and the respiratory syncytial virus.

6. The lungs and windpipes were important symbols in Ancient Egypt. In humans and other animals, the lungs and windpipe must work together to provide the tissues and cells of the body with oxygen. The ancient Egyptians understood the importance of this cohesion for survival, and created a hieroglyph that depicts the lungs attached to the windpipe, to symbolize the unity between upper and lower Egypt that was necessary for the country to be strong and healthy. Because pharaohs were responsible for ruling over the two lands, the lungs-windpipe hieroglyph is often found on artifacts belonging to pharaohs, including clothing, furniture and jewelry.

7. Elephants have a unique respiratory system. In the respiratory system of mammals, a thin sheet of tissue called the pleura wraps around the lungs and lines the chest cavity. The area between the layers of pleura is known as the pleural space, or pleural cavity, and it contains pleural fluid, which provides lubrication as the lungs expand and contract. Unlike all other mammals, the pleural cavity of elephants is filled with tough connective tissue. This unusual structure allows elephants to snorkel and withstand the differences in pressure above and below water, without rupturing the blood vessels in the lining of their lungs, according to a 2001 article in journal Respiration Physiology.

8. Chest movement during breathing is not the result of air movement. When you breathe in, our chest swells; when you breathe out, our chest collapses. But these chest movements are not actually the result of air filling up or exiting the lungs. During inhalation, the diaphragm — a thin sheet of dome-shaped muscle that separates the chest and abdominal cavities — contracts and moves down, increasing the space in the chest cavity. At the same time, the muscles between the ribs contract to pull the rib cage upward and outward. During exhalation, the exact opposite happens.

9. Asthma was once treated with psychotherapy. Modern science has shown that asthma is a chronic lung disease that causes the airways to become inflamed and narrowed. It's a physical illness that can be exacerbated by psychological factors. Between the 1930s and 1950s, however, people thought the roots of asthma were psychological. Therefore, treatments for asthma focused mainly on psychoanalysis. Therapists even interpreted a child's asthmatic wheezing as a suppressed cry for his or her mother, according to a 2005 article in the journal Clinical Practice & Epidemiology in Mental Health.

10. Horses only breathe through their nose. For humans, breathing through the mouth comes naturally and easily. The same is true for many other mammals: Dogs, for example, pant to cool off. Horses, however, only breathe through their nostrils. They have a flap of tissue that forms a tight seal over the oral cavity, which prevents them from breathing through their mouths, even in respiratory distress. When they eat and swallow food, that flap closes off the nasal cavity and opens up the oral cavity, allowing food to go down the pharynx (the upper part of the throat.).

11. Pulmonary circulation was first described in the 13th century. Pulmonary circulation is the process by which blood travels from the heart to the lungs and then back to the heart. This flow keeps the heart supplied with oxygen, which the blood picks up from the lungs.In 1243, the Arab physician Ibn al-Nafis became the first person to describe this complicated process, when he detailed it in his work, "Commentary on Anatomy in Avicenna's Canon."It wasn't until 300 years later that European scholars came to the same conclusion, according to a 2008 article in the Journal of Applied Physiology.

The Process of Breathing

Breathing In (Inhalation)

When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.

Breathing Out (Exhalation)

When you breathe out, or exhale, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the chest cavity. As the space in the chest cavity gets smaller, air rich in carbon dioxide is forced out of your lungs and windpipe, and then out of your nose or mouth.

http://www.nhlbi.nih.gov/health/health-topics/topi...

What is asthma, how does it affect somebody, and how does it work?

Asthma

(I made this myself on the paint app.)YAY

Parts of Your Respiratory System and Their Functions

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. 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.

Diaphragm
Breathing starts with a dome-shaped muscle at the bottom of the lungs called the diaphragm (DY-uh-fram). When you breathe in, the diaphragm contracts. When it contracts it flattens out and pulls downward. This movement enlarges the space that the lungs are in. This larger space pulls air into the lungs. When you breathe out, the diaphragm expands reducing the amount of space for the lungs and forcing air out. The diaphragm is the main muscle used in breathing.

Trachea
The trachea (TRAY-kee-uh} is sometimes called the windpipe. The trachea filters the air we breathe and branches into the bronchi.

Bronchi
The bronchi (BRAHN-ky) are two air tubes that branch off of the trachea and carry air directly into the lungs.

http://hes.ucfsd.org/gclaypo/repiratorysys.html#Pa...

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