Principles of Animal Physiology
Principles of Animal Physiology
Principles of Animal Physiology
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<strong>Principles</strong> <strong>of</strong> <strong>Animal</strong> <strong>Physiology</strong><br />
Respiratory System<br />
Respiratory Mechanics<br />
▪ Pressures associated with breathing<br />
▸ Atmospheric (barometric) pressure<br />
♦ At sealevel = 760mm Hg (1atm or 101.3 kPa)<br />
▸ Intrapulmonary (intra-alveolar) pressure<br />
♦ May be less ess tthan, a , equal equa to oor ggreater eate tthan a at atmospheric osp e c<br />
pressure<br />
▸ Intrapleural (intrathoracic) pressure<br />
♦ Always less than atmospheric pressure, except during<br />
maximal, forced expiration<br />
▸ TTransmural l pressure<br />
♦ Pressure difference between alveolus and pleural cavity<br />
♦ Pressure difference betwen atmostphere and pleural
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