Circulatory System

1
Circulatory System

• Chapter 46 Page 932

2
What is the structure and function of the
circulatory system?

• Discovery Health Video Heart Attacks
• Structure (parts of the system)
• Function (many job this system does)
• http//health.discovery.com/diseases-conditions/vi
  deos/heart-health-heart-attacks.htm

3
Heart page 933

• Cardiovascular system blood, heart, blood
  vessels
• Lymphatic System lymph nodes, lymph, and lymph
  vessels
• Cardiovascular and lymphatic systems make up the
  CIRCULATORY SYSTEM
• FUNCTIONS transport nutrients, hormones, gases,
  gets rid of waste, and maintains body temperature

4
Central Organs of CS

• Most important organ of the CS is the heart
• Relatively the size of the human fist
• Divided into atriums and ventricle
• The atriums are the top parts
• The valves are the bottom parts (ventricles)

5
Circulation of Blood in the Heart

• 1. Deoxygenated (lacking oxygen) blood enters the
  right atrium.
• 2. The right atrium sends the O2 lacking blood
  into the right ventricle.
• 3. The muscles of right ventricle contract and
  force the blood into the pulmonary arteries.
• 4. The PA sends the blood to the lungs

• 5. The oxygenated blood returns to the left
  atrium of the heart
• 6. The oxygenated blood is then pumped into the
  left ventricle (forces the blood to the aorta)
• 7. This is when blood is transported to all parts
  of the body
• 8. The aorta and the left ventricle work together
  to by the final checkpoint before it is released
  from the heart

6
Lymphatic System page 939

• Major areas where lymph nodes tonsils, thymus,
  spleen, and bone marrow.
• Disease-fighting cells of the immune system are
  also located here
• Lymph excess fluid that comes from the tiny
  vessels of the lymphatic system

• Blood vessels form a complete circuit or rotation
• LS is a direct path that starts the lymph
  rotation
• Lymphocytes white blood cells that are
  specialized to fight disease
• Infection? Nodes may become inflamed or swollen

7
Circulatory Review Questions

1. Describe the structure of the heart.
2. Outline the path that blood follows
3. What things cause a heartbeat to slow down, speed
   up, or stay constant?
4. What is the difference between oxygenated blood
   and deoxygenated blood?
5. What 2 systems make up the circulatory system?