cardiovascular system (pp1)

• Cardiovascular system consists of the Heart, blood, blood vessels, Pulmonary circuit and the systemic system
• Blood vessels are hollow tubes that transport blood throughout the body.
• what are the 3 major blood vessels?

  Arteries, Capillaries and Veins
• What are the functions of blood?

  • Trasport gases, nutrients and waste
  • fight infections.
  • Regulate temperature and hydration.
• Define Thermoregulation

  process that allows the body to maintain it's core internal temperature
• Define Hypothermia

  Potentially dangerous drop in temperatures
• Define Hyperthermia

  elevated body temperature due to failed thermoregulation
• ways the body cools down is sweating, Vasodilation
• Vasodilation is when the blood vessels get wider to increase blood flow to the skin
• Vasoconstriction is when blood vessels get narrower, decreasing blood flow to skin
• Thermogenesis is when the body's muscle, organs and brain produce heat in different ways
• causes of hypothermia is exposure to cold temperatures for a long period of time.