Circulatory

• red blood cells - has hemoglobin to carry 02 throughout the body
• white blood cells - attacks foreign substances, function in immune system
• platelets - stick to wounds and release clothing factors
• ischemic stroke - clot from another part of the body goes to the brain and blocks one of the blood vessels in the brain
• hemorrhagic stroke - artery inside the brain leaks and results in internal bleeding
• arteries have thicker walls than arteries
• atherosclerosis only occurs in arteries
• flu virus evolves continuously
• humans can contract the same cold twice, although the second reaction is much more milder
• renal artery - carries blood that has waste in it to the kidney

  renal vein - carries filtered blood out of the kidney
• kidneys play a role in maintaining blood volume and pressure
• smoking increases the rate of heart disease by accelerating atherosclerosis
• inflammation - immune system recognizes and removes harmful and foreign particles and begins the healing process
• infection - invasion and growth of germs in the body
• lost fluid in the lymphatic system is known as lymph
• #1 cause of death in the US: cardiovascular disease
• antidiuretic hormone/ vasopressin - hormone that regulates water amount in body by controlling amount of water reabsorbed by kidneys
• anemia - not enough oxygenated rich blood due to lack of red blood cells being produced
• emphysema - chronic detoerioation fo the lungs and the lungs do not expand and relax during inhalation and exhalation
• During a heart attack, one or more of the coronary arteries are blocked and blood flow to the muscle of the heart is severely reduced, causing heart cells to be damaged or die, which results to the heart not being able to pump blood effectively
• blood volume increases = blood pressure increases
• if someone's kidneys aren't functioning properly, they need to go to dialysis to get hooked up to a machine to filter them