cardiovascular system

• Function of cardiovascular system?

  Transport of o2 co2 and nutrients

  clotting of wounds

  regulation of body temperature
• structure of the heart

  vena cava

  right atrium

  semi lunar valve

  right ventricle

  semi lunar valve

  left ventrivle

  bicupsid valve

  left atrium

  aorta
• systemic Circulatory System

  systemic circuit carries blood around body to deliver oxygen and returns deoxygenated blood to hearts
• What does the right pump do

  The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart.
• what does the left pump do

  The left pump sends the newly oxygenated blood around the body. By the time this blood returns to the heart, it has returned to a deoxygenated state
• blood enters the heart

  Deoxygenated blood from the body enters into the right atrium of the heart
• Blood pumped to lungs

  This deoxygenated blood is pumped out of the heart and towards the lungs by the right ventricle
• where does blood return to the heart

  Oxygenated blood returns to the left atrium of the hear
• where is blood pumped to the body

  This oxygenated blood is pumped out of the heart and to the body by the left ventricle
• Components of the blood.

  Red blood cells

  White blood cells

  platelets

  Plasma
• Red blood cell functions

  Carry oxygen from lungs to working Muscles

  Removes co2

  Haemoglobin binds the oxygen
• White blood cell functions

  Part of the immune system

  Travel in blood and fight disease/infection
• Plasma function

  Fluid that helps blood flow

  Allows oxygen to reach muscles
• Platelets function

  Clot blood and form scabs

  Heals the body quickly.
• What are the 3 blood vessels

  Arteries

  Veins

  Capillaries
• Arteries characteristics

  Elastic

  Thick muscular walls

  High pressure

  Small lumen
• Arteries function

  Maintain blood pressure

  Carry oxygenated blood away from the heart
• Veins characteristics

  Thinner walls

  Low pressure

  Has valves

  large lumen
• Veins function

  Carry deoxygenated blood back to the heart

  Prevent backflow of blood
• Capillaries characteristics

  Very thin walls

  One cell thick

  Semi perbeable
• Capillaries function

  Site of gaseous exchange

  Co2 and waste taken away

  Oxygen and nutrients passed into cells
• Vascular shunting types

  Vasoconstriction and Vasodilation
• Vascular shunting steps

  1. Increased demand of oxygen
  2. Blood flow increased to working muscle groups
  3. Vasoconstriction/vasodilation
  4. Redistribution of blood flow