Which system is responsible for the exchange of oxygen and carbon dioxide? skeletal circulatory respiratory endocrine

hurry 50 points

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. the following chemical equation shows the combustion of ethane. balance the equation by filling in the coefficients. c2h6 + o2 → co2 + h2o

Wich organism obtains its energy from dead or decaying matter

What maintain homeostasis when a persons internal body temperature is 97.5°f