THE SYSTEMS OF THE HUMANBODYSCIENCEJUAN FRANCISCO GARCÍA
RESPIRATORY SYSTEM“Remember to breathe. It is after all, the secret of life.”― Gregory Maguire, A Lion Among Men
RESPIRATION AND THE RESPIRATORY SYSTEM Breathing and respiration are often used to mean the same thing. However, breathing is only one part of respiration. Respiration Is the process by which a body gets and uses oxygen and releases carbon dioxide and water. It´s divided into two parts: Cellular respiration: involves chemical Breathing: involves inhaling and reactions that release energy from exhaling. food.
RESPIRATION AND THE RESPIRATORY SYSTEM Respiration Respiratory System• The exchange of • A collection of oxygen and organs whose carbon dioxide primary function is between living to take in oxygen cells and their and expel carbon environment. dioxide.• Includes breathing and cellular respiration.
ORGANS OF THE RESPIRATORY SYSTEM Throat Nose • Pharynx and • Larynx PassagewaysTrachea • Bronchi • Bronchioles Lungs
NOSE, PHARYNX AND LARYNX NOSE Is the main passageway into and out of Air can enter and leave through the nose the respiratory system. and the mouth. PHARYNX It branches into two tubes. Air, food and drink travel through the it. • The esophagus, leads to the stomach. • The larynx, leads to the lungs. LARYNX The vocal cords area pair When air flows betweenHere are contain the vocal of elastic bands that stretch the vocal cords, the cords cords. across the larynx. vibrate producing sounds.
TRACHEA, BRONCHI AND ALVEOLI TRACHEA The larynx guards the entrance to a The trachea is the passageway for air large tube called trachea. traveling from the larynx to the lungs. BRONCHI The trachea splits into Each bronchus branches One bronchus connects two branches called into smaller tubes called to each lung.bronchi (sg. Bronchus). bronchioles. ALVEOLIIn the lungs, each bronchiole branches Here is where the oxygen and carbon to form tiny sacs called alveoli (sg. dioxide exchange happens. Alveolus)
BREATHING When you breathe, air is sucked into or forced out of your lungs. It is done by the diaphragm and the rib muscles.
When you Exhaling is this inhale, the process in diaphragm reverse. contracts and moves down.As a result, yourchest cavity gets The chest bigger and a cavity´s volume vacuum is increases. created. Air is sucked in. At the same time, some of your rib muscles contract and lift your rib cage.