(6)+Respiratory+system+-+Efficiency+&+cleaning

(1) Respiratory system: efficiency & cleaning = **What is the Respiratory System?** = The respiratory system is a group of organs that together allow us to inhale oxygen into our bodies and exhale carbon dioxide back out. Without our respiratory system we wouldn't be able to breath and therefore we would die. The respiratory system is the the anatomical system of organisms which performs gas exchange. The function of the respiratory system is to transfer oxygen into the lungs and to facilitate the diffusion of blood flow into the oxygen. It also recieves carbon dioxide which is a waste and exhales it. It is made of different organs. **Lungs:**
 * List features that make the respiratory system efficient, and explain each one…
 * (Hint moist, thin, SA, passive…)
 * The lungs are the main and most important part of the respiratory system because the oxygen that is breathed into someone's body is taken into the lungs and carbon dioxide is breathed out.
 * The red blood cells carry the oxygen from the lungs to different body cells that need the oxygen and while they're there they pick up carbon dioxide and transport it back to the lungs to be breathed out.

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**Trachea:**
 * The trachea, also known as a windpipe, is what filters the air that we inhale and directs it to the bronchi.

**Cilia:**
The cilia in your respiratory system are tiny thin hairs that move back and forth. They catch the dust and microbes that are in the air you breath in, and, similar to the way you transport food through your digestive system, they push it upwards either towards the nose, to be exhaled and removed there, or towards your digestive system, in order to be removed along with all the other waste of your body. []

**Bronchi:** =**What is Bronchitis?**= ====You may have heard of the disease called Bronchitis, well this disease is when bacteria infects the Bronchi and causes the bronchi to become inflamed. Inflamed bronchi basically means that the airways of the bronchi are more narrow because of some sort of infection that is blocking up the airways.==== **What makes lungs so efficient?** The walls of the alveoli and capillaries are very thin which makes the distance between the air and blood very short. The surface area of the capillaries are very big. =**Describe how we keep our respiratory system clean (without even knowing it)**= > As the same time to inhale in air through your mouth and nose, and the air heads down your trachea, and windpipe. Down your windpipe, small hairs around there called cilia move to remove all the mucus and dirt out of the lungs. Goblet cells releases mucin which dissolves in water, then becomes mucus, which are is in your throat that makes it lubricant.
 * The trachea filters the air to the bronchi which are two tubes leading from the trachea into the lungs.
 * **Property of Surface** || **Reason** ||
 * Thin (best one cell thick) || Gases have a shorter distance over which to diffuse. ||
 * Large surface area || Many molecules of gas can diffuse across at the same time. ||
 * Moist || Cells die if not kept moist ||
 * Well ventilated || Concentration gradient for oxygen and carbon dioxide are kept up by regular supplies of fresh air. ||
 * Close to a blood supply || Gases can be carried to and from the cells that need or produce them. ||
 * Diffuse || for particles to move from an area of higher concentration to an area of lower concentration ||
 * When you inhale, your diaphragm contracts and flattens out. This makes your diaphragm move downwards so that your lungs have more room to grow larger as you inhale air. Your rib muscles life the ribs up and out so that the lungs have more space to grow.

The air we breathe in are not always clean or safe, that's why, we need goblet cells and mucus to help clean the air before they enter our lungs. Goblet cells are mostly located inside the lining of the respiratory and digestive tracts. Its main function is to secrete mucus, a sticky and green liquid that has a huge responsibility for the respiratory system. It helps the sensitive tissues by not letting them dry out, trap pathogens or any harmful invading microbes. media type="youtube" key="miEEluVlemQ" width="425" height="350" media type="youtube" key="Htelg8Xe6Ws" height="315" width="420"

After understanding the concept of respiration you could test yourself by going thorugh this quiz, If you got them all right, then its great, if not then you can know what to study and improve on

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More detailed definition of: Bronchi: Bronchi is the plural word of bronchus (Greek word bronchos), which is a tube to the lungs. Large air tubes that convey air to and from the lungs. The air tubes lead from the trachea to the lungs. The bronchi has cartilage, which is a piece of animate skeleton as a supporting wall structure. Trachea: Also called a windpipe, is an important part in the vertebrate respiratory system. Trachea connects the nose and mouth to the longs with a bony tube. When a person is breathing in, the air flows into the lungs, and from that, respiration occurs through the windpipe. If the trachea is harmed, it will be life-threatening for the person. [] []

Edited by Khanh An Vu