Successfully reported this slideshow.
Your SlideShare is downloading. ×

THE HEART AND BORDERS.pptx

Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Loading in …3
×

Check these out next

1 of 10 Ad

More Related Content

Recently uploaded (20)

Advertisement

THE HEART AND BORDERS.pptx

  1. 1. THE HEART AND BORDERS OF THE HEART
  2. 2. INTRODUCTION: • The heart is an organ of endless fascination the heart begins to function before any major organ in the human embryo. • A heartbeat is picked on an embryo that is no more than four weeks then the heartbeat rhythmically continues throughout the heart. • Normal heartbeat 70 times per minute. • 100,000 times a day.
  3. 3. LOCATION: • The heart is located in the thoracic cavity between the lungs. This area is called the mediastinum. The base of the cone-shaped heart is uppermost, behind the sternum, and the great vessels enter or leave here. The apex (tip) of the heart points downward and is just above the diaphragm to the left of the midline.
  4. 4. PERICARDIAL MEMBRANES: • The heart is enclosed in the pericardial membranes, of which there are three layers. • The outermost is the fibrous pericardium, dense, tough, elastic, and non- porous. • Within the pericardium, there are two further layers of the serous pericardium. • The outer layer of the serous pericardium is called the parietal pericardium and is attached to the inner surface of the fibrous pericardium and roots of blood vessels emerge from the heart. • The parietal layer becomes continues with an inner layer called the visceral pericardium. It very firmly adheres to the surface of the heart.
  5. 5. CHAMBERS: • The walls of the four chambers of the heart are made of cardiac muscle called the myocardium. The chambers are lined with endocardium, simple squamous epithelium that also covers the valves of the heart • The upper chambers of the heart are the right and left atria, which have relatively thin walls and are separated by a common wall of myocardium called the interatrial septum. The lower chambers are the right and left ventricles, which have thicker walls and are separated by the interventricular septum.
  6. 6. BORDERS OF THE HEART: • There are five borders of the heart: • Right border • Left border • Superior border • Inferior border • Apex border
  7. 7. • RIGHT BORDER: • It is formed of the anterior right atrium. • LEFT BORDER: • It is made up mainly of the left ventricle and left article mainly a small contribution of the upper end of the border. • SUPERIOR BORDER: • It is formed by the right atrium and left atrium but the majority of part is formed by the right atrium.
  8. 8. • INFERIOR BORDER: • It is formed by the right ventricle and left ventricle but the majority of the part is formed by the right ventricle. • APEX BORDER: • It is formed by the left ventricles.
  9. 9. FUNCTIONS: • Pumping blood around our body as our heartbeat. • It does this: • Pumping deoxygenated blood from your body to your lungs, • Pumping oxygenated blood to from your lungs to your body
  10. 10. THANKS FOR YOUR ATTENTION

×