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handout_1_Ariel - Ariel Go(Jag Handout 1 lectures1-5...

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Ariel Go (Jag) Handout 1, lectures1-5 [email protected] OH Fridays York 1030, 12-1pm ANATOMY OVERVIEW ________ respiratory tract: nasal cavity through larynx ________ respiratory tract: trachea through alveoli. At the bronchioles through alveoli = no cartilage, collapsible. _____________ Zone: nasal cavity -> bronchioles (anatomical dead space), air moves in and out but no gas exchange Total cross sectional area _____________ from trachea - > bronchioles -> alveoli Movement of gas occurs via ____________ across alveoli to blood Lungs: o Right - ___ lobes: o Left - ___ lobes: RESPIRATORY SYSTEM FUNCTIONS 1. 2. 3. 4. 5. EXTERNAL RESPIRATION = movement between environment and the body’s cells 1. Ventilation – exchange between atmosphere and lungs 2. Diffusion/gas exchange – exchange between lungs and blood 3. Gas transport – transport of gasses in blood via Hb 4. Cellular respiration – exchange between blood and cells (e- transport chain) INSPIRATORY MUSCLES = increase volume of the thorax, decreasing pressure 1. ____________ - increases volume in vertical plane, inserted into lower ribs, innervated by the phrenic nerves from C3-C5 cervical spinal cord (if damaged above, cannot breathe) 2. ______________________ - inserted in upper ribs, contraction raises chest wall and bows ribs outward, thus increasing volume in horizontal plane 3. Needed for forced inspiration a._____________________ - inserted in sternum and clavicle, origin mastoid process b. ____________ -inserted in upper ribs Both increase volume of thoracic during contraction EXPIRATORY MUSCLES = decrease volume of the thorax (at rest, elastic recoil is sufficient for expiration) 1. _______________________ - inserted in ribs, push ribcage down and decrease volume in horizontal plane QuickTimeª and a Graphics decompressor are needed to see this picture.
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Ariel Go (Jag) Handout 1, lectures1-5 [email protected] OH Fridays York 1030, 12-1pm 2. ______ - push organs up towards thorax, decrease volume in vertical plane THORACIC CAVITY Heart is enclosed in ___________
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