RESPIRATION

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gill filaments provides the whole animal with an efficient gas exchange. The surrounding water keeps the gills wet.
The heart pumps the blood throughout the body to distribute the oxygen to all the tissues and to bring the carbon dioxide back to the lungs to be exhaled.
Your lungs are large and in charge of breathing,
Air enters the body through either the open mouth or the nose. It travels down the trachea to the lungs, where the oxygen in it passes into the bloodstream.
The larynx (voice box) is part of the respiratory system that holds the vocal cords. It is responsible for producing voice, helping us swallow and breathe.

The final branches of the respiratory tree, alveoli are where oxygen from the air enters your blood, and carbon dioxide from your body is expelled back into the air.
The bronchi are two air tubes that branch off of the trachea and carry air directly into the lungs
The pharynx is part of the digestive system as well as the respiratory system because it carries both food and air.
The trachea (or windpipe) is a wide, hollow tube that connects the larynx (or voice box) to the bronchi of the lungs.

The diaphragm in the respiratory system is the dome-shaped sheet of muscle that separates the chest from the abdomen.
A flap, the operculum, covers and protects the gills of bony fish.
The epiglottis is a flexible flap at the superior end of the larynx in the throat.To permit air to enter the airway to the lungs and food to pass into the gastrointestinal tract.
Each bronchus divides into smaller and smaller tubes called bronchiolies.

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