ANATOMY

Detailed explanation-1: -The main function of the circulatory system is to provide oxygen, nutrients and hormones to muscles, tissues and organs throughout your body. Another part of the circulatory system is to remove waste from cells and organs so your body can dispose of it.

Detailed explanation-2: -Natriuretic peptide is a cardiovascular hormone secreted by the heart. It can excrete sodium and diuretic, expand blood vessels and inhibit aldosterone secretion.

Detailed explanation-3: -Hormones which when appearing in excess increase the heart rate are: catecholamines, endothelins, glucocorticosteroids, thyroid hormones, leptin and PTHrP. Those which decrease the heart rate include: natriuretic peptides, substance P, neurokinin A, oxytocin, angiotensin 1-7.

Detailed explanation-4: -The cardiovascular system delivers oxygen, nutrients, hormones, and other important substances to cells and organs in the body. It plays an important role in helping the body meet the demands of activity, exercise, and stress. It also helps maintain body temperature, among other things.

Detailed explanation-5: -Metabolic changes are important settings for cardiac cells under these conditions because the cardiovascular system must maintain energy balance to preserve work output and efficiency of the heart. Cardiovascular system is regulated by hormones which control, adjust, and remodel heart metabolism.