Achemical analysis of blood leaving the left ventricle of the heart would reveal that the blood has which of the following gas concentrations?

Which beat describes the brain stem

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?