the respiratory system gaining oxygen from the environment while riding the body of water and carbon...
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The Respiratory System
Gaining oxygen from the environment while riding the body
of water and carbon dioxide
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Breathing vs. Respiration
• Breathing is the movement of air into and out of the lungs.
• Respiration is the releasing of energy through chemical reactions that act on oxygen and glucose inside cells.
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Nose
• The nose is where air enters into the nostrils. The nose is lined with cilia and mucus.
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Cilia• Cilia traps particles of dirt and dust from
the air. The cilia filters the air we breathe.
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Mucus
• Mucus warms and moistens the air that enters the body. Mucus is present in the nasal cavity and other locations throughout the body.
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Pharynx
• Another term for the throat, which is the passageway that air enters through the nose.
• Food also enters via the pharynx.
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Trachea
• A tube made of cartilage that leads from the pharynx toward the lungs.
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Cartilage Rings
• Rings around the trachea that strengthen the trachea and keep it open.
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Bronchi• Branches that lead from the trachea into the
lungs. Bronchi passageways get smaller and smaller until they reach the alveoli. The right and left bronchi lead to each lung; part of them are inside and part are outside of the lungs.
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Alveoli
• Alveoli are tiny sacs of lung tissue that allow oxygen to pass into the blood and carbon dioxide to pass out of the blood.
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Lungs
• The main organs of the respiratory system. Inside the lungs are passageways called bronchi which direct air into the lungs.
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Diaphragm
• The diaphragm is a large arched muscle that moves downward when inhaling to allow more air in, and moves upward when exhaling to push more air out.
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Epiglottis• The epiglottis is a flap of tissue that seals
off the windpipe to prevent food from entering into the airways.
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Larynx
• The larynx is the voce box of the body; it is located in the top of the trachea under the epiglottis.
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Vocal Chords
• The vocal chords are folds of connective tissue that stretch across the larynx (voice box) to produce a person’s voice.