Lewis is running in a race. His muscles need oxygen. Which best describes how multiple systems interact to bring him into homeostasis? The circulatory system brings oxygen to the respiratory system, which delivers oxygen to the muscular system.
The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system.
The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the skeletal system.
The circulatory system brings oxygen to the respiratory system, which delivers oxygen to the skeletal system

Ok, before buying a burger. think of you diet and calories. how many calories are you suppose to eat a day. and look at how much fat, calories, salt is in it. if it is ok to you, then buy it. but if you think that it's to much fat and salt for you. don't buy !

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.

Why don't give me a problem to work with and i will you with the problem