I think the component is hostility. From most research there is a connection between type A behavior pattern and coronary heart disease. The recent researches show that Hostility is the most toxic component of the type A behavior pattern. Hostility is a better predictor of coronary heart disease in aged men than the variety of other sociodemographic and physiological risk factors including drinking, smoking among other factors.
Ventilation maintains a steep concentration gradient, blood at the exchange surface usually has lower O2 and higher CO2 content than the air (of for fish, the water) at the exchange surface. This is what allows for diffusion of O2 into the blood and CO2 out of the blood. Multicellular organisms have a greater number of cells so will have a higher energy demand than single cellular organisms, this demand can only be met by allowing the cells to respire, a ventilation system brings oxygen molecules which are a raw product of respiration into the hemoglobin of the blood to be transported to tissues. As surface area : volume ratio is very low so if there was no ventilation system and the organism instead relied on exchange of materials through the exposed skin it would be very difficult to met the high energy demand as less O2 and CO2 would be able to be exchanged.
Answer:
OT
Explanation:
sequence of the genetic makeup of a cell, organism or individual,
