The Respiratory System PDF

The Respiratory System Is responsible for breathing (respiration). Respiration process: It is a process of entering the oxygen into the body and pushing the carbon dioxide out of the body. The human Respiratory system consists of: 1. Nose 2. Throat (pharynx) 3. Tr...

The Respiratory System Is responsible for breathing (respiration). Respiration process: It is a process of entering the oxygen into the body and pushing the carbon dioxide out of the body. The human Respiratory system consists of: 1. Nose 2. Throat (pharynx) 3. Trachea 4. Two lungs (like balloons) 5. Diaphragm Inside the lungs, the trachea is branched into two tubes called "two bronchi" that divided into smaller tubes that look like the branches of a tree known as "bronchioles".  At the ends of these tubes there are little sacs that surrounded by blood vessels called "air sacs" or “Alveoli" that extract oxygen gas from the air.  Inside the blood vessels, oxygen moves into the blood stream, then reach all the body to help organs and systems to work. Air Sacs Lungs Two Trachea Bronchioles (Alveoli) Bronchi  How does the Respiratory system work? 1. Inhalation (breathe in.) 2. Exhalation (breathe out.) Air enters by TWO 1.Inhalation nose and Throat Trachea LUNGS mouth  Inhalation and exhalation are directed by a large muscle at the base of the ribs called the diaphragm. Comparison Inhalation Exhalation 1. Diaphragm The diaphragm The diaphragm relaxes muscle contracts (shrinks) (expands) and moves and moves upward. downward. 2. Size of chest The size of chest The size of chest increases (enlarges). decreases (narrow). 3. Type of air The air rich in The air rich in carbon oxygen gas enters the dioxide gas is expel out lungs. of the lungs.  NOTES  Carbon dioxide gas is a waste and is harmful to our bodies.  We can't hold our breath for a very long time? Because we can't inhale oxygen and expel out carbon dioxide so, the body can't respirate.  How can you keep the respiratory system healthy? 1. Breathing clean air. 2. Eat fruits rich in vitamin (C) such as orange and guava. 3. Avoid smoking and smoking areas.  Our bodies need oxygen in order to do their functions.  We get oxygen gas from the air around us all the time.  We cannot store extra oxygen in our bodies, so we must constantly take in new oxygen.  How does the respiratory system get oxygen to the body cells? Oxygen enters lungs during inhalation, then the blood transfers oxygen to all body.