3rd quarter

• circulatory system

  transports material throughout the entire body
• blood, transports nutrients, gases, hormones to and from cells

  cardiovascular system
• transports lymph

  lymphatic system
• organ system:

  heart, blood, blood vessels
• blood vessels

  pathway of blood
• muscular organ that pumps blood to diff parts of body

  heart
• circulating medium

  blood
• 3 layers of tissues form (heart walls)

  epicardium, myocardium, endocardium
• epicardium

  outer layer
• inner layer

  endocardium
• middle layer

  myocardium
• muscle that divides the heart into four chambers

  septum
• receiving chambers

  atria
• right atrium

  receives oxygen-poor blood from vena cava
• largest vein

  vena cava
• receives blood from pulmonary veins

  left atrium
• ventricles

  pumping chambers
• pumps blood to lungs for oxygenation

  right ventricle
• left ventricle

  pumps oxygen-rich blood to all parts of the body
• valves

  flaps of muscles
• 2 sets of valves: atrioventricular & semilunar
• at the base of large vessels leaving the ventricles

  semilunar valves
• atrioventricular

  between atria & ventricles
• blood vessels in the heart: pulmonary veins, pulmonary artery, aorta
• aorta

  largest artery
• carries oxygen-rich blood pumped by left ventricle to all parts of the body

  aorta
• carries oxygen-rich blood back to the left atrium

  pulmonary veins
• pulmonary artery

  carries blood pumped by the right ventricle to the lungs for oxygenation
• types of blood vessels: arteries, veins, capillaries
• capillaries

  smallest & most numerous blood vessels
• veins

  carries blood from all parts of body to the heart
• ateries

  carries oxygen-rich blood away from the heart
• circulation of blood: oxygen-poor blood & oxygen-rich blood
• enters heart from the body and goes out to lungs

  oxygen-poor blood
• enters heart from lungs goes out to body

  oxygen-rich blood
• blood circulation pathways: pulmonary circulation & systemic circulation
• liquid tissue & circulating medium

  blood
• 8% of human weight consists of blood
• average liter of blood in an adult?

  5
• liquid portion of blood

  plasma