Heart

• the circulatory system carries oxygen and nutrients around the body
• pulmonary artery sends blood to the lung
• arteries carry blood away from the heart
• veins carry blood back towards the heart
• valves prevent backflow of blood.
• 1. blood flows into heat through vena cava and pulmonary vein
• vena cava is on what side of the heart?

  right
• pulmonary vein is on what side of the heart?

  left
• where does blood from pulmonary vein come from

  lungs
• blood from pulmonary vein is oxygenated since its from the lungs
• vena cava is de oxygenated
• vena cava is bringing back blood from the body
• right atrium containins deoxygenated blood and contracts to right ventricle.
• left atrium contains oxygenated blood and contracts it into the left ventricle.
• the ventricles contract pushing blood out of the pulmonary artery and aorta
• what side is pulmonary artery on?

  right
• what side is aorta on?

  left
• where does the pulmonary artery pump blood to?

  lungs
• where does the aorta pump blood to?

  body
• the atria refill with new blood and the cycle repeats
• how does the cycle repeat?

  when the atria refill with new blood.
• the cycle repeats 70 times a minute
• cells in the right atrium act as a pacemaker.
• the pacemaker keeps steady beat of heart
• pacemaker cells produce small electrical pulses making walls of heart contract
• artificial pacemakers are placed under the skin of the heart and are controlled by a battery
• pulmonary artery carries blood away from heart
• pulmonary vein carries blood to heart
• coronary arteries branch off of the aorta
• coronary veins make sure muscle tissue gets oxygen and nutrients
• the left ventricle has thicker walls becuase ithas to pump blood around the body
• oxygenated is left side
• deoxygenated right side is villain
• oxygenated left side is hero
• oxygenated blood is from lungs
• deoxygenated blood is from body
• what may be blocked is oxygenated blood isnt getting to the heart muscle?

  coronary artery