Respiratory System

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by hannahyestrepsky
Last updated 5 years ago


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Respiratory System

The Respiratory System

The respiratory system contains organs that help an organisim to breathe. Respiration is defined as-the breathing process which delivers oxygen from the external atmosphere to the body and removes the carbon dioxide from body

The Nostrils- bring air into the nose, where air is warmed and humidfied. The cilia hairs filter out dust and particles presnet in the air while protecting the nasal passage. The Trachea- The trachea filters the air we inhale and branches into the bronchi.The Bronchi- The bronchi are the two air tubes that branch off of from the trachea and carry atmospheric air directly into the lungs.The Lungs- Lungs are the site in body where oxygen is taken into and carbon dioxide is expelled out. The Alveolus- Alveolus is the tiny sac like structure present in the lungs which the gaseous exchange takes place. The Diaghram- Breathing begins with a dome-shaped muscle located at the bottom of the lungsThe Ribs- The ribcage functions in protecting the vital organs and blood vessels, and expands and contracts to allow for efficient breathing.

Breathing has two phases, inspiration and expiration. During inspiration the diaphragm and the external muscles contract. The diaphragm moves downward increasing the volume of the chest cavity, and the external muscles pull the ribs up and outward, expanding the rib cage. This increase of volume and lowers the air pressure in the lungs. Because air always flows from a region of high pressure to an area of lower pressure, it travels in through the body’s airway into the alveoli of the lungs. During a resting expiration the diaphragm and external muscles relax, restoring the chest cavity to its original volume, and forcing air out of the lungs into the air.



Breathing Rate


Alveoli and the Capillaries

Breathing rate is primarily regulated by neural and chemical mechanisms. Respiration is controlled by spontaneous neural discharge from the brain to nerves that innervate respiratory muscles.

Inside the lungs, the bronchus split into smaller branches to form thousands of tiny sacs called alveolii. The capillaries surround the alveolli and absorb the oxygen

By: Hannah Yestrepsky


CPR- It is an emergency lifesaving procedure that is done when someone's breathing or heartbeat has stoppedEpiglottis- a flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.Gas Exchange- a biological process through which different gases are transferred in opposite directions Larynx- the hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans/mammalsVital Capacity-the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath.

Oxygen Debt- A cumulative deficit of oxygen resulting from intense exercisePharynx- the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.Pleural Membrane- lines the inner chest wallRespiratory Control Center-receives controlling signals of neural, chemical and hormonal nature and controls the rate and depth of respiratory movements of the diaphragm and other respiratory muscles.


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