Physiology is really fun. Please try to classify the information in smaller components. For example: types of muscles, their similar and specific properties, their composition and the differences in composition based on the muscle type, their specific and general electrophysiological properties, their regenerative abilities and their common as well as special functions.
Cardiovascular system is one of the most important system in human body. You may classify its primary components: atria, ventricles and valves in the heart, major blood vessels, properties of their walls, functions and proerties of cardiac muscle and so on.
Such approach should help you from getting overwhelmed with the information and you are likely to remember it better.
Please go through the relevant questions and make sure that you have covered everything.
Hope it helps.