Respiratory System 1

Nota:

• Alveoli does this. Human have more than 300 million alveoli and have a diameter of 300 micrometer 

1. Alveoli

   Nota:

   • Surfactant lowers the surface tension, made by Type II Pneumocyte.

Nota:

• Respiratory, anatomical dead space, around 150 ml, consist of the throat etc etc, all the way down before alveoli.

Nota:

• Bulk of the lung It is also where the cross sectional area increases rapidly.

Nota:

• Respiratory cycle consists of inspiration and expiration. Airflow- (Patm-Palve)/Resistance of airway.

Nota:

• Cardiac output passes thru the pulmonary cirtuit at 6 litres per min. Mean pulmonary artery pressure is 15mmhg compared to Mean blood pressure. Bronchial arteries consists of oxygenated blood.

Nota:

• 1st Stage: Nose hairs 2nd Stage: Ciliated airway with goblet cells, mucus Macrophage

1. Coughing

   Nota:

   • 1. Inspiration (around 2.5 l of air) 2. Epiglottis closes and vocal cords closes 3. Increase of pressure by forceful contraction of abdominal muscles 4. Sudden opening of vocal cords and epiglottis 5. Air expel. Sneeze is similar.

Nota:

• overall PV=nRT PV=PV Boyle's Law V/T=V/T Charles Law Avogardo's Law: ! mol of gas occupies the same amount of pressure and molecules.  at Odeg, 1 mol = 22.4L Dalton's Law of partial pressure: P total is equal to the sum of all parts. Henry's Law, the conc of the given gas will dissolve in equilibrium in direct proportion to the partial pressure C=SolX P

1. Gas Tension

   Nota:

   • Gas diffuse down the tension gradient

Nota:

• 20.93% oxygen 0.03% Co2 79.04% nitrogen and others.