Med Term

• Heart


  • Contains four muscular sections or chambers that briefly hold blood before moving it
  • Responsible for producing contractions, a rhythmic cycle of muscle shortening and tightening
  • Right and left lungs lie directly on either side of the heart
  • Lowest part of the exterior of the heart is called the apex
• Blood pressure is how powerfully the heart travels through blood vessels, normal blood pressure is 120/80 mmHg
• Chambers of the heart

  • Right atrium
  • Left atrium
  • Right ventricle
  • Left ventricle
• Ventricles

  • Located in the bottom chambers of the heart, receive blood from the atria and pump the blood into the systemic circulation
• Function of the heart

  Move blood throughout the body, bringing oxygen and nutrients to cells and removing carbon dioxide and waste
• Pulmonary Circulation

  Blood is pumped from the heart to the lungs and then back to the heart
• mmHg


  Stands for millimeters of mercury
• 120 Systolic - contraction of the ventricles, 80 Diastolic - Relaxation of the Ventricles
• Heart rate is the number of times the heart beats in one minute
• Heart and lungs work together by

  Heart sends blood throughout the body, carrying oxygen to every cell, blood returns to the heart, then sent to the lungs to pick up more oxygen, cycle repeats
• Aorta is the largest artery of the human body
• Layers of the heart

  • Pericardium
  • Myocardium
  • Endocardium
• Heart


  A fist-sized organ that pumps blood throughout the body, the main organ of the cardiovascular system, made up of muscle and tissue
• Heart

  • Controls the rhythm and speed of the heart (heart rate), maintains blood pressure
• Atria


  • Located in the upper chambers of the heart, receive blood from the veins of the body
• Measure blood pressure

  Using a Sphygmomanometer which includes a cuff, gauge, and balloon
• Pericardium - The sac that the heart is enclose by
• Myocardium - The layer of cardiac muscle that makes up the middle layer of the heart
• Endocardium - the innermost layer that lines the 4 chambers of the heart
• The heart has 4 chambers - right and left atria, right and left ventricles
• Ventricles - located in the bottom chambers of the heart-recieve blood from the atria
• The heart and lungs work together by sending blood throughout the body and carrying oxygen to every cell
• Pulmonary Circulation - Blood is pumped from the heart to the lungs and then back to the heart
• mmHg- stands for millimeters of Mercury
• Contractions are shortening and tightening of the muscles
• The Apex is the top of the heart, where the blood leaves the heart.
• The heart is the size of a fist and weighs about 1.5 pounds
• The heart contains Four Muscular sections: Left Atrium Left Ventricle Right Atrium Right Ventricle
• 120 - Systolic / Contraction of the ventricles
• 80 - Diastolic / Relaxation of the ventricles
• Diastolic is the pressure when the heart is relaxed and filling with blood
• Systolic is the pressure of the blood in the arteries when the heart is contracting
• systemic circulation is the blood that goes around the body and returns to the heart