Writing Resources
The heart is undoubtedly the most vital organ in the human body The heart is an organ which is responsible for sending blood to organs for them to function correctly Innerbody 2018 states that the placement of the heart is within the thoracic cavity The heart is comprised of many different muscle tissues but the main and most abundant one being cardiac muscle Revisionworld com 2018 Electrical impulses within the walls of the heart ensure that the pumping of the heart is rhythmic by causing the walls to contract according to Nhlbi nih gov 2018 The blood that is pumped by the heart travels around the body providing oxygen and nutrients to cells and removes waste from them ibid Innerbody 2018 adds on by explaining the heart does this by receiving deoxygenated blood from the veins and directs it to the lungs to get oxygenated which is followed by pumping the blood to other organs Pdhpe net 2018 writes that the heart belongs to the circulatory system and the pumping action is essential to maintain stable internal temperature and fight infections However if the heart were to stop operating then organs of the body would be forced to shut down Lewis T 2016 further adds by stating the size of the heart tends to be around the proportion of a fist and can weigh between 280 to 340 and 230 to 280 grams in men and women respectively Innerbody 2018 shows that the heart is within the pericardial cavity which is full of fluid The fluid is useful for lubricating the heart to reduce friction with every heartbeat ibid New Health Advisor 2018 indicates that the pericardium is a thin membrane that holds the heart in place and also contains the fluid for lubrication
