Answer:
Endocardium: is the innermost layer of the heart.
Myocardium: is the muscle layer
Pericardium: is a double-wall sac that cointains the heart.
Explanation:
While the Pericardium protects the heart against infection, provides lubrication and fixes it to the mediastinum, the Myocardium is the middle layer from the heart and the thickest one. It has specialized muscle fibers that carry electrical impulses to the ventricles. It is the muscle layer comprised of cardiomyocytes. The endocardium is comprised of two layers: the inner one is made of endothelial cells and the second one is a subendocardial connective tissue where branches of the heart's conduction system are inmersed.
Answer:
Breathing is affected in higher altitudes for several reasons. One is that there is less oxygen. This makes it so less oxygen gets into your lungs. Another reason is that the air becomes cooler and drier. This can affect asthma.
Explanation:
Answer:
Improving cardiovascular fitness can reduce your risk of developing heart disease by increasing the efficiency of your heart, lungs, and blood vessels. The easier it is to pump blood through your body, the less taxing it is on your heart.
Explanation:
