circulatory

• circulatory system 


  transports nutrients and oxygen-rich blood to all parts of the body and to carry the oxygenated blood back to the lungs
• organs of the cardiovascular system


  heart, blood vessels, blood
• heart


  muscular organ that pumps blood throughout the body
• blood vessels


  arteries, veins, capillaries
• blood


  red blood cells, white blood cells, platelets, plasma
• 3 circuits of circulatory system

  pulmonary, systemic, coronary
• pulmonary


  carries blood (without oxygen) from heart to lungs
• pulmonary veins


  (lung veins) filtered oxygen blood to heart. blood vessels that transfer freshly oxygenated blood from the lungs to the left atria of the heart
• systemic


  blood with oxygen nutrients and hormones travel from the heart to the rest of the body/throughout the body
• coronary


  heart arteries provide heart muscle with oxygenated blood. returns oxygen-poor blood to the heart, to the right upper chamber-atrium to send to lungs for oxygen
• blood vessels


  arteries, veins, capillaries
• arteries

  thin muscular tubes that carry oxygenated blood away from the heart to the rest of the body. largest artery - aorta, smallest artery - arterioles
• veins


  this blood vessels carry oxygen-depleted blood to the heart. smallest vein - venules
• 2 central veins


  superior vena cava - carries blood from upper body (heart and arms) to the heart

  inferior vena cava - brings blood up from lower body (stomach , pelvis, legs)
• capillaries


  connects very small arteries and veins. exist throughout the body. smallest blood vessels.

  oxygen and nutrients from the blood can move through the walls and get into organs and tissues.
• capillaries


  take waste products away from tissues. where oxygen and nutrients are exchanged for carbon dioxide and waste
• blood


  transport many substances throughout the body and helps maintain homeostasis (balance of nutrients waste and gases)
• 4 components of blood

  plasma, RBC, WBC, platelets
• plasma


  liquid part of the blood. 55% of our blood, 45% RBC,WBC,platelets, 92% water
• red blood cells


  also known as erythrocyte. takes up oxygen in lungs and delivers it to the cells
• white blood cells


  also known as leukocyte. soldier of the body, protects body from disease, part of immune system. leukemia - abnormal number of WBC
• platelets


  also known as thrombocytes. used in forming blood clots to slow/stop bleeding. found in blood and spleen. helps wounds heal
• average heart beat is 60-100 cardiac cycles per minute
• an average adult has 4.5-5.5 liters of blood
• aneurysm


  occur when an artery wall weakens and enlarged
• high blood pressure


  arteries work hard to circulate blood throughout the body because blood vessel is clogged. leads to a heart attack, stroke
• atherosclerosis


  arteries clog with fat causing myocardial infarction (death of cardiac muscle)
• arteriosclerosis


  arteries clog with bits of minerals excess mineral
• schemic stroke


  blockage in a blood vessel that delivers blood of oxygen to the brain
• hypertension


  "silent killer" no symtopn, a medical condition which constricted arterial vessels increase the resistant to blood flow, causing the blood tp exert excessive pressure against vessel wall
• thrombosis


  formation of blood clot inside the blood vessels