Cardiac Muscle Contraction

The heart is analogous to any other muscle inside the human figure in seeing that the aforementioned contracts and expands. Furthermore, each time the heart contracts it does so with all its dynamism. The pumping of the heart is titled the Cardiac Cycle.

The Myocardium is made up of specialised cardiac muscle, only found in the heart and is not under voluntary control.

There are three main types of muscle tissue in the body: Skeletal muscle, smooth muscle and cardiac muscle. Firstly, skeletal muscle has a stripped appearance when it is examined under a microscope so it is sometimes known as striated/stripped muscle. Skeletal muscle is voluntary and this means that it is under conscious control. Secondly, there is smooth muscle which is an involuntary muscle that operates without any conscious control. This muscle is controlled by the nervous system. Smooth muscle can be found in the blood vessels and the walls of the digestive system and it helps to control digestion and blood pressure. Lastly, there is cardiac muscle which is located in in the wall of the heart. Cardiac muscle is involuntary and this means that it is not under conscious control. This is made up of a specialised type of tissue which is striated and it has its own blood supply. The contractions aid the pumping of blood through the blood vessels

Cardiac muscle-The cardiac muscle is the heart, it is responsible for pumping blood around the body. It is made up of cardiac muscle and is the only location in the body where such muscle is found, Unlike other muscles, cardiac muscle is almost completely reliant on oxygen to function, Cardiac muscle is an involuntary muscle that is present in the heart and helps to synchronize the beating of the organ.the cardaic muscle is very strong and it resiatnt fatigue, The cardiac muscle is found in the walls of the heart and is responsible for keeping the heart pumping.

Oxygen and nutrients the body requires for function are pumped around this complex network of blood vessels by the heart. At roughly the size of a human fist, the heart is a four-chambered muscle and performs two functions of circulation simultaneously and continuously. Systemic and pulmonary circulation. The heart is made up from three separate layers of cardiac tissue; the outer layer called the pericardium, which is a double sac-like outer covering with serous fluid inside to keep the middle layer, the myocardium from adhering to the outer layer. This middle layer of the heart is the heart muscle which is thicker on the left side, to aid with the pressure needed to sustain systemic circulation. The inner layer of the heart is the endocardium. It’s lining is smooth to help prevent the blood which circulates around the inside of the heart from clotting. The heart is the human body’s in-built pacemaker, and the electrical signals sent through the it cause the heart to contract and relax. This process is triggered by the autonomic nervous system and the contraction and relaxing cycle is

The heart is a very strong muscle that has one major job. The heart’s job is to pump blood throughout the entire body. The heart is made up of 4 chambers, and 4 valves. There is the right and left atrium, and a right and left ventricle. The atriums are the superior chambers, and the ventricles are inferior chambers. The left ventricle is the most important, because that is where the blood travels through to go to the aorta, and eventually the rest of the body (Taylor 2015).

The human body consist of 680 skeletal muscles. The name of a muscle can distinguish its location, action, shape, and function. One such example is the biceps brachii, which is commonly referred to as biceps. As the name implies, this is a two-headed muscle. The term biceps brachii is a Latin phrase that means, "two-headed muscle of the arm." This is references to the fact that the muscle consists of two bundles of muscles. Each of these bundles has its own origin and share a common insertion point near the elbow joint. The biceps brachii muscle is the one that gave all muscles their name because it comes from the Latin, musculus, meaning, "little mouse.". This originated because the appearance of the flexed biceps resembles the back of the

The human heart is a muscular pump. The muscle layer that takes care of the contraction of the heart to decrease the size and forces the blood out of its chambers is called myocardium.

Atrial fibrillation (AF) is the commonest arrhythmia. It is characterised by disorganised random electrical activity in the atria that results in a lack of effective atrial contraction. It is associate with a five-fold risk of stroke and a three-fold incidence of congestive heart failure, and overall higher mortality. There are many known risk factors for the development of acute AF including coronary artery disease (CAD), hypertension and valvular heart disease but AF may occur in the absence of any underlying cardiac or non-cardiac disease . As its incidence increases with age and with the ageing of western populations it is becoming ever more common in surgical patients.

Cardiac muscle is involuntary because the heart works all the time and never gets fatigued unlike skeletal muscle which is voluntary because it is used for body movement such as sitting, walking and lifting. Skeletal muscle differs from cardiac muscle as it is multinucleated compared with cardiac muscle that is uninucleated. This means skeletal muscle have more than one nucleus and cardiac muscle has one nucleus in the muscle cells. Also, cardiac muscle has semi-spindle shape-like cells compared to skeletal muscle which has cylindrical shaped-like cells. Cardiac muscle has a good blood supply in contrast to skeletal muscle that has well- supplied nerve and blood vessels. Furthermore, cardiac muscle has 3

Another problem surgeons faces is the connecting of the circulatory system of the heart. The coordination of atrial and ventricular contractions is necessary for efficient pumping of the blood. Any damage leads to a loss of coordination and diminished heart function. But how do surgeons and doctors come to make sure the circulatory is system is working at its best is by using an electrocardiogram, or ECG. With this procedure, electrodes are placed on key points of the body's surface to monitor the electrical activity of the heart. However, what happens if the low flowing of blood or blockage of the blood comes to happen. Myocardial infarctions, or heart attacks happens, and it its due to the blockage or reduction of blood flow to an area of

The main function of the cardiac muscle is to pump blood around the body and essentially keep us alive. Whereas, the skeletal muscle has many basic functions such as enabling you to move freely, postural support, and in heat and energy production. The cardiac muscle has evolved to have incredibly high strength and endurance because the heart beats powerfully and continuously throughout an entire lifetime

Has anyone ever wondered what happens inside of the body? Or about cell really makes the human body work? The answer is cardiac muscle. This is what really makes the body work. The cardiac muscle is located on the inner walls of the heart. It helps the heart pump blood to the rest of the body, without it the body would die, that is why it is the imperative for a person's health..

A heart is a vital organ in a human being, which is situated in the centre of the chest and behind the breastbone. It is a muscular organ that pumps the blood into the human body. It is the approximately the size of a fist. The heart consists of a special muscle called cardiac muscle. Cardiac muscle does not get tired like the muscles in your legs and arms, but instead works continuously by responding to signals to an area of the heart called the pacemaker. (Pearson 2011, p.100-111). Even though the heart is the most vitalist organ in the human body, which carries rich nutrients and oxygen, defects can occur. The most common defect that occurs is a congenital heart defect, which is commonly known as a hole in the

Cardiac muscles is a type of muscle found only in the walls of the heart and is responsible for pumping blood throughout the body - the function being transportation and the transportation vehicle being blood. The heart is approximately the size of your fist, is very strong and resistant to fatigue as it works constantly, day and night, throughout your life.