The heart is the pump that pushes the blood around the body. It is about the size of a clenched fist and sits in the centre of your chest behind your rib cage and sternum. The heart is surrounded by a number of vessels that carry blood either towards the heart or away from the heart. The blood carried by the vessel can either
The abdominal aorta supplies the abdominal walls, viscera, and ends at T4 level where it branches into right and left common iliac arteries to supply the pelvis and lower limbs. The superior vena cava vein receives systemic blood draining from all areas superior to the diaphragm except the heart wall. It unites with the right and left brachiocephalic veins and empties into the right atrium. Both brachiocephalic veins are formed by the joining of the internal jugular and subclavian veins. The inferior
The blood vessels are pathways of blood flow in the body. There are three main types of blood vessels: Arteries, capillaries and veins. Whatever the blood is a specialised tissue of the human body that exists in fluid form. It’s one of the five basic types of tissues of the body. The blood consists of two major portions: blood cells and plasma.
The cardiac cycle is vital in all organisms with a heart, to pump blood round the body. There are phases of the cardiac cycle; systole (contraction) and diastole (relaxation). The heart consists of 4 chambers, 2 being the atria at the top of the heart and the other 2 being the ventricles at the bottom of the heart. Systole occurs separately in the atria and ventricles and diastole occurs simultaneously in all 4 chambers. The cardiac cycle is controlled by electrical waves that spread throughout the heart.
Right now I am located in the right femoral vein, which is located in the upper thigh and pelvic region of the body. It is also one of the largest veins in the venous system. The femoral vein’s purpose is to take all the blood in the lower region of the body and deliver it to the heart via the iliac vein. Today’s
The serous membrane secretes serous fluid into the space between the visceral and parietal layers that allows smooth movement between the layers, when the heart beats. The Myocardium: The myocardium is the middle layer of the heart and is composed of specialised muscle tissue called as the cardiac muscle, on which the circulation of blood depends. It varies in thickness, being thickest in the left ventricle, thinner in the right ventricle and thinnest in the artrium. The Endocardium: The endocardium forms the inner linging of the heart is a thin, smooth, glistening membrane consisting of flattened epithelial cells which is continuous with the valves and with the lining of the blood
The mediastinum (located between the lungs in the thoracic cavity) contains the heart, thymus, esophagus, trachea, and several large blood vessels. 11. Describe the quadrant and regions in which you would expect to find the CT patient’s and a normal person’s
The function of these muscles is closely related to their structure and any differences in structure allow these two types of muscle to be identified. Cardiac and skeletal muscle is excitable tissue where stimulation of a single muscle fibre leads to excitation of a whole cell. They undergo contractions in response to an action potential, either resulting in pumping blood into pulmonary and systemic circulation or the movement of limbs. The contractile unit in both tissues is the same, the differences lie in the arrangement of these units and associate structures. The contractile unit consists of myofibrils which encompass repeating units of sarcomeres running end to end giving a striated appearance to the muscle.
Locate each of the following lymphatic vessels: right lymphatic duct, thoracic (left lymphatic) duct, right and left subclavian veins, and cisterna chyli. a right lymphatic duct b.thoracic (left lymphatic)duct c.right brachiocephalic vein d.cisterna chyli . e. Determine the direction of blood and lymph movement between arterioles, blood and lymph capillaries, and venules. Starts as interstitial fluid then enters lymphatic capillaries then travels in lymphatic vessels to lymph nodes. The lymph ascends or descends to the left or right lymphatic duct.
The right atrium receives deoxygenated blood via the superior and inferior vena cava. The blood then goes through the right ventricle and out to the lungs where it becomes oxygenated. The oxygenated blood then travels to the left atrium via the pulmonary veins, to the left ventricle, and then out to the rest of the body and organs through the aorta. The blood also supplies oxygen and nutrients to the heart via the coronary arteries that branch from the aorta. This pumping action of blood flow is controlled by electrical impulses in the heart.