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Understanding Respiration Process in Human Anatomy

Explore the intricate process of respiration in human anatomy, from the external phases of air movement to the internal chemical reactions for oxygen intake and cellular respiration. Learn about the structures involved, such as the diaphragm, intercostal muscles, nose, pharynx, larynx, trachea, bronchioles, alveoli, and lungs.

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Understanding Respiration Process in Human Anatomy

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  1. 13 Respiration pgs382-384 • 2 Phases • External (physical) • -movement of air in & out 500 cc/ml of air=Tidal volume • Structures used: • a. Diaphragm-skeletal muscle activity—drop (contract) • increase chest volume decrease air pressure • result—inhalation (inspiration-air flows in) • -rise (relax) • decrease chest volume increase air pressure • video result—exhalation (expiration-air flows out) • b. Intercostal muscles-skeletal rib muscles • activity: lift ribcage—inhale • lower ribcage--exhale

  2. II. Internal Phase (chemical) • Intake & transport of O2—arterial blood • Use of O2 by cell—mitochondria—cellular respiration • O2+ C6H12O6 CO2 + H2O + 38 ATP’s (energy) • c. Removal of CO2 from cells—venous blood

  3. ANATOMY pgs 376-377 • Nares—entrance • Nasal Cavity & nasal septum: Function: conditions the air • a. Warm the air • b. Moisten the air • c. Clean the air • Olfactory nerves • Hard & Soft Palate • Pharynx-(throat)-common passage • uvula-extention of soft palate • tubes from ears • tonsils

  4. Larynx-(voice box)-formed by cartilage • -epiglottis-flap prevents choking • -glottis-opening between vocal cords • 7. Trachea (windpipe)-lined w/cilliated mucosa • -horseshoe shaped rings 8. Bronchus (2)-Primary bronchi right branch is larger 9. Bronchioles—tiny tubes bronchial tree 10. Alveolus—air sacs at end of bronchioles -thin walled covered w/surfactant -diffusion of O2 & CO2 11. Lungs—sealed cavity video

  5. Pleura—double-walled sac • -1 attached to lungs • -1 attached to thoracic cavity • -in between pleura cavity filled w/pleura fluid (lubricant) • Paranasal sinuses— • -lighten the skull • -resonance for sound • -produce mucous

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