RESPIRATORY SYSTEM (SCIENCE 9)

• RESPIRATORY SYSTEM - this organ system is responsible for taking in oxygen and expelling carbon dioxide.
• NOSE AND MOUTH - entrance of oxygen in our body
• NASAL CAVITY - also called passageways / the air passing thi part is warm, damp, and clean.
• PHARYNX - our throat
• LARYNX - voice box
• TRACHEA: a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.
• LUNG - main organ of the respiratory system
• BRONCHI - two branching tubes / connects the trachea to the lungs
• BRONCHIOLES - hair like tubes that connect to the alveoli
• ALVEOLI - wherein the gas exchange happens
• INHALATION - a process in which the oxygen enters our body
• EXHALATION - carbon dioxide exits the body
• INHALATION - ribs move out and chest space increases
• DIAPHRAGM - muscle located below the lungs, it contracts during inhalation and relaxes during exhalation.
• EXHALATION - ribs move in and chest space decreases
• LUNGS - spongy organs where gases are exchanged with blood
• INTERCOSTAL MUSCLES - muscles between the ribs that contract to increase the volume of the thoracic cavity