Cardiac cycle Essays

Describe the function of the heart, cardiac cycle and circulatory system Function of the heart The heart is a muscular organ that pumps and circulates blood throughout the body via a transport system of arteries and veins and capillaries. As the blood circulates throughout the body it supplies oxygen and nutrients to the tissues as well as removing carbon dioxide and harmful waste products (Tucker, 2015). The structure of arteries Arteries have thick muscular walls and a small lumen passage

also experiencing dyspnea as well as nausea. A fourth heart sound was discovered upon cardiac examination, and an angiogram revealed right coronary artery occlusion. Question: What is it that physiologically occurs during a myocardial infarction which leads to the formation of an S4 sound? Generate: Heart auscultation is useful in characterizing heart sounds and identifying abnormalities that may suggest cardiac dysfunction.1 The fourth heart sound (S4 atrial gallop), heard during the patient’s

Almost half of a human 's body weight is composed of muscle. There are three distinct types of muscle tissue: cardiac muscle, skeletal muscle, and smooth muscle. Each of the muscle tissues have different structures, properties, characteristics, and roles in our body. Properties of muscle tissues include excitability, contractility, extensibility, and elasticity. Contractility is the ability to shorten, which causes movement of the structures to which the muscles are attached. Excitability is the

travel throughout the body. The capillaries connect the arteries to the veins. The veins take blood back into the heart in a cycle. Some other features

The cardiac cycle is the coordination of the filling and exhausting of blood by electrical signals that cause the heart muscles to contract and unwind. The contraction of the heart is directed by a nerve drive that goes from the SA node to AV node to AV group to Purkinje fibers to the myocardium. Amid the cardiac cycle, the heart contracts by means of systole, pushing blood out of the heart, and unwinds through diastole, filling the heart with blood. Cardiomyocytes, or cardiac cells, are striated

INTRODUCTION Muscle tissue is one of the four primary tissue types consisting elongated muscle cells that are highly specialized for carrying out certain responsibilities. Muscles are responsible for movement of different parts of the body; posture; respiration; production of body heat; communication; constriction of organs and vessels and contraction of heart. General properties of muscles: Contractility is the ability of muscle to shorten forcefully although its shorten forcefully, it lengthens

105). Contributing to more than half of the body’s mass, muscles were the body’s movers, shakers and stabilizers (105). Muscles were classified into three categories: skeletal, cardiac and smooth. Skeletal muscles were the only voluntary muscles meaning a person had total control over its movements. On the other hand, cardiac and smooth muscles were characterized by their auto-rhythmicity. The contraction and relaxation of muscles were made possible through the ability of filaments inside sarcomeres

are usually of supraventricular origin, though narrow complex ventricular tachycardias were rarely reported in the literature (Hayes et al, 1991). Supraventricular origin of the tachycardia means the obligatory involvement of one or more of the cardiac structures above bifurcation of His bundle. Those include the atrial myocardium, the AV node, the proximal His bundle, the coronary sinus, the pulmonary veins, the venae cavae, or abnormal atrio-ventricular connections, namely bypass tracts (Lau,

resuscitate order. Also How to get a do not resuscitate order from your doctor. DO NOT ATTEMPT RESUSCITATION ORDER should not be a health care alternative because it is not ethical, some are not mentally stable enough to make the decision, and having cardiac arrest does not help (“ATTEMPT” 1). It sets out in law how decisions should be made on behalf of a person who lacks capacity (Breault 1). Try not to revive , or no code, is a lawful request composed either

P4 – Describe the three structures of the skeletal muscle (Epimysium, Perimysium and Endomysium) There are three structures of the skeletal muscle: Epimysium is a thick layer of irregular connective tissue that pulls the entire muscle as well as protecting the muscle from friction that may be caused by other muscles and bones surrounding them. Also, it is the fibrous tissue which covers and surrounds skeletal muscles. The Epimysium carries on past the end of bones in order to create muscle tendons

The sliding filaments theory of muscle contraction was discovered in 1954 proposed that muscle contraction is an onset cyclic process which involves the sliding of filaments and the shortening of sarcomere. Striated muscles such as skeletal muscles contain a highly organised internal structure which allows these muscle to contract following the mechanism of sliding filament theory. Skeletal muscle contraction requires an action potential which is an electric signal sent though motor neurones towards

Smooth muscle is the muscle found in all hollow organs of the body except the heart, and is generally not under voluntary control. Cardiac muscle, the only type of muscle which does not experience fatigue, is the muscle found in the walls of the heart which continuously pumps blood through the heart. Skeletal muscle is the muscle attached to the skeleton which is the type of muscle that

There is a lot to think about when it comes to transplanting muscle fibers. Since there are fast twitch and slow twitch muscle fibers all over the body within every muscle group, one would have to extract the entire muscle. Then there is the issue with the cells of the tissue staying alive during the process of removal and transplant. However, it is possible to increase the number of muscle fast twitch muscle fibers through surgery, but one will not be able to do so without transferring over some

2 Hip Muscles and Movements The hip joint is a multi-axial ball-and-socket joint, and therefore, movements along perpendicular planes occur over a wide arch of motion, namely flexion and extension, adduction and abduction, medial and lateral rotation, and circumduction . Muscles surrounding the hip are divided into groups; each is mainly, but not only, responsible for a certain movement of the hip. The main hip flexor is the psoas muscle, helped by the iliacus, but also other muscles assist in hip

Ability of muscle to lengthen and permit the joint to move through range of motion is known as flexibility. Flexibility of a specific jointis evaluated from range of motion. Efficiency and effectiveness of human movement is depends on muscle tissue length of specific joint.1 Flexibility of a person is might be limited due to several musculoskeletal overuse injuries and significantly affect a person’s joint ability. Hamstring is one of muscle groups that have a tendency to get shorten. Predisposing

Our spine is one of the delicate organ of nervous system, as it protects the central nervous system of human body, as well as the main support for the body to stay upright. It comprises of small bones placed one over the other which provides flexibility for movement. The upper part of spine is terminated in the skull. This region where the spine is attached to the skull is called the cervical region or neck. Pain in the neck or cervical pain is one of the diseases that are found very often in

electric stimulus to the heart muscle in order regulate the heartbeat. Functionally, a pacemaker comprises at least three parts: a electrical pulse generator, a power source and an electrode system. It is used to treat abnormal heart rhythms called Cardiac dysrhythmia or arrhythmias The development of artificial pacemaker begins with the introduction of the galvanism theory. In 1762, Luigi Galvani became an anatomy lecturer at the University of Bologna. On November 6, 1787, when he was slowly skinning

~ “Failure is only the opportunity to begin again, only this time more wisely.” -Henry Ford (owner of Ford Motor company) “What if I don’t make it?’’ and “What if I tryout poorly?” are a few of the questions I ask myself constantly when I am preparing for a sports tryout. A few years back, I was head-to-head with a couple of crucial decisions that would change my perspective on failing forever. I had a choice: I could have chosen to quit, or I could have chosen to persevere. The law of life that

Satellite Cell, Muscle Hypertrophy and Exercise Serife Vatansever1 Burcin Olcucu2 1Abant Izzet Baysal University, School of Physical Education and Sports, Department of Trainer Education, Bolu, Turkey. 2Gaziosmanpasa University, School of Physical Education and Sports, Department of Coaching Education, Tokat, Turkey. Abstract Optimal repair and adaptation of skeletal muscle is facilitated by resident satellite cells (satellite cells). Satellite cells are not only responsible for muscle repair

exterior portion of the body and is seen by others as expression and body movement. Muscles can be categorized into three groups, smooth muscle, cardiac muscle, and skeletal muscle. Cardiac muscles surround the heart and are significant for contracting the heart, allowing for the pumping of blood throughout the body. The contractions made by the cardiac muscle are involuntary, which means that it has the