During heavy exercise, the co2 in muscle may drop to 20 mm hg. considering the oxygen-hemoglobin dissociation curve below, what is the approximate percent o2 saturation of hemoglobin in venous blood returning from skeletal muscles during heavy exercise?

precisely the author keeps the interest of readers not describing clearly the   kind of relationship in giselle's family. by doing this, readers had to imagine and assume how it was.   instead, the author described better scenes with dark star and the influence of books about horses in giselle's life and actions.   also the fact that she broke her arm but not referring to it in detail leads the readers to imagine and guess what could have occurred.

explanation:

daily refers to frequency, like weekly or monthly. take this medicine twice daily, once in the morning and again at bedtime. on a daily basis there refers to everyday life, to one's normal or usual behavior, activity, routine, or schedule, to the quotidien.