Respiratory System Take a deep breath and relax
Respiratory System Take a deep breath and relax
Structure • • Nose Pharynx Larynx Trachea Bronchi Alveoli Lungs
Nose/Mouth • When the air comes into your nose it gets filtered by tiny hairs and it is moistened by the mucus that is in your nose • Your sinuses also help out with your Respiratory System. They help to moisten and heat the air that you breathe. • Air can also get into your body through your mouth/oral cavity but air is not filtered as much when it enters in through your mouth (We take in more air here)
Nose/Mouth Picture
Pharynx/Trachea • Your pharynx (throat) gathers air after it passes through your nose and then the air is passed down to your trachea (windpipe). • Your trachea is held open by “incomplete rings of cartilage. ” Without these rings your trachea might close off and air would not be able to get to and from your lungs. Mouth Pharynx (Throat) Trachea
• Bronchi (singular bronchus)- left and right transport the air you breathe • Bronchiolessmaller divisions of the bronchi • Bronchioles end in small air sacs called alveoli
Capillary wall Carbon Dioxide is dropped off Oxygen is picked up Red Blood Cell • Alveoli – tiny air sacs that exchange oxygen and carbon dioxide.
Lungs • Lungs: 2 unequal lobes • Covered in a membrane called the pleura • Have many alveoli
Diaphragm • Diaphragm and muscles contract, thoracic cavity enlarges letting air into the lungs • Controls breathing and lung capacity
Lung Model
Fun Facts • At rest, the body takes in and breathes out about 10 liters of air each minute. * The right lung is slightly larger than the left. * The highest recorded "sneeze speed" is 165 km per hour. * The surface area of the lungs is roughly the same size as a tennis court. * The capillaries in the lungs would extend 1, 600 kilometers if placed end to end. * We lose half a liter of water a day through breathing. This is the water vapor we see when we breathe onto glass. * A person at rest usually breathes between 12 and 15 times a minute. * The breathing rate is faster in children and women than in men.
- Slides: 12