HWLP What is the function (purpose) of the valves which connect the heart chambers?

allows blood to flow from the atria to the ventricle
allows blood to flow between the two ventricles
allows blood to flow between the two atria
prevents blood from flowing into the atria when ventricle pumps

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

yes

explanation

they do and it slaps