External respiration Flashcards
What is so special about tunafish?
Consistently swim with mouth open to get air using ram ventilation, have extremely thin gills with a large surface area, have a high metabolism
What does a membrane do in respiration?
Separates internal tissues from environmental air/water
During external respiration
Oxygen is transported to membrane and CO2 is transported away
Is the partial pressure of O2 lower or higher in the animal compared to the environment?
Always lower, you want O2 to flow in
Define gills
Evaginated from body, surrounded by environment, brachial
Define lungs
Invaginated into body, contains environment, pulmonary
Define internal gills
Evaginated from body, project into superficial body cavity
T or F: Ventilation can be passive or active
True
Define active ventilation
Animal creates ventilatory currents of air or water that flow to and from gas-exchange membrane
Define passive ventilation
Environmental air or water currents directly or indirectly induce flow to and from gas exchange membrane
What is the rate of oxygen uptake
V(Ci-Ce)
O2 partial pressure in blood leaving a breathing organ is the best single measure of
The organ’s effectiveness
T or F: a titdally ventilated lung is sometimes fully emptied
False
