Biology 12 Respiration

Respiratory Structure and Function
-general overview of respiration


Mechanics of Breathing
-review of increasing pressure by decreasing the volume of space in lungs
-decrease air pressure by giving the air more room, aka, open up your lungs


Mechanics of Breathing
-intercostal muscles and diaphragm work together to increase or decrease air pressure
-reminder that the thoracic cavity is a fancy term for chest


Oxygen Transport
-movement of oxygen into alveolar capillaries
-98% of the oxygen that makes it into the plasma gets picked up by red blood cells
-2% stays dissolved in the plasma
-red blood cells have hemoglobin (protein molecules)
-hemoglobin has four heme groups, pigments with iron that can bind and release oxygen
-partial pressure of oxygen refers to how much oxygen is in a particular area
-oxygen moves from high partial pressure of oxygen in the blood and moves to surrounding tissue which has, you guessed it, lower partial pressure of oxygen
-omit the saturation graph


Partial Pressures and Respiration
-gases travel from high pressure to lower pressure
-blood oxygen pressures are higher in blood than surrounding tissues and move from the red blood cells to the tissues
-carbon dioxide partial pressures are higher in neighbouring tissues and lower in the blood so CO2 moves into the blood
http://southhill.vsb.bc.ca/Departments/BEST/Biology12/Supplementary/Human_Biology/Respiration/Partial_Pressures_diagram.pdf


Review of Respiratory System-includes great diagram of bronchioles
-reminder of brain's function in detecting oxygen content in blood
-tubes slow passage of air, moisten, and warm it
-diagram of alveoli and mentions its size
-reminder of diffusion of oxygen at alveoli


3D of diaphragm-in case you've never heard of the diaphragm


The Respiratory notes in your handout have since been updated and are viewable on the Southhill website, from Mr Kirkwood, Biology teacher. Thanks Mr. K!