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Pleural cavity
Epiglottis
Right lung
Rib
Bronchi
Left lung
Alveoli
Trachea 
Larynx
Pharynx
Diaphragm
Nose
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Transcript

Nose

Diaphragm

Pharynx

Larynx

Trachea

Alveoli

Left lung

Bronchi

Rib

Right lung

Epiglottis

Pleural cavity

The nose detects odor molecules and helps filter and warm the air we inhale.

The epiglottis is a small, movable "lid" just above the larynx that prevents food and drink from entering your windpipe

The lungs' main role is to bring in air from the atmosphere and pass oxygen into the bloodstream.

The rib cage protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities. During inspiration the ribs are elevated, and during expiration the ribs are depressed.

The pharynx acts as a passageway for food on its way to the stomach and for air en route to the lungs. The mucosal epithelium in the pharynx is thicker than elsewhere in the respiratory tract as it has to protect the tissues from any abrasive and chemical trauma caused by food

Larynx, also called voice box, a hollow, tubular structure connected to the top of the windpipe (trachea); air passes through the larynx on its way to the lungs. The larynx also produces vocal sounds and prevents the passage of food and other foreign particles into the lower respiratory tracts.

The trachea serves as passage for air, moistens and warms it while it passes into thelungs, and protects the respiratory surface from an accumulation of foreign particles.

The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.

The lungs are like bellows. When they expand, they pull air into the body. When they compress, they expel carbon dioxide, a waste gas that bodies produce

Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

The Bronchi Are Passageways That Bring Air In and Out of the Lungs. The tubes of the primary bronchi branch off from the bottom of the trachea. These branches subdivide further into secondary and tertiary bronchi and then into the bronchioles.

The pleural cavity, with its associated pleurae, aids optimal functioning of the lungs during breathing. The pleural cavity also contains pleural fluid, which acts as a lubricant and allows the pleurae to slide effortlessly against each other during respiratory movements.

  • Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)

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