How do the RESPIRATORY and CIRCULATORY systems work together to allow you to perform cellular respiration?

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping

Why are some places regularly warmer or cooler than others in a given month