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Circulatory system

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  • 1. What is the circulatory system?
    The circulatory system carries blood and dissolved substances to and from different places in the body.
    • The Heart has the job of pumping these things around the body.
    • 2. The Heart pumps blood and substances around the body in tubes called blood vessels.
  • Aorta
    Brings oxygen-rich blood from the left ventricle to the rest of the body
    Superior Vena Cava
    Large vein that brings oxygen-poor blood from the upper part of the body to the right atrium
    Pulmonary Arteries
    Bring oxygen-poor blood to the lungs
    Pulmonary Veins
    Bring oxygen-rich blood from each of the lungs to the left atrium
    Pulmonary Valve
    Prevents blood from flowing back into the right ventricle after it has entered the pulmonary artery
    Aortic Valve
    Prevents blood from flowing back into the left ventricle after it has entered the aorta
    Mitral Valve
    Prevents blood from flowing back into the left atrium after it has entered the left ventricle
    Tricuspid Valve
    Prevents blood from flowing back into the right atrium after it has entered the right ventricle
    Inferior Vena Cava
    Vein that brings oxygen-poor blood from the lower part of the body to the right atrium
    Structure of the Circulatory System
    Left Atrium
    Right Atrium
    Left Ventricle
    Septum
    Right Ventricle
  • 3. The Heart
    Artery to Lungs
    Artery to Head and Body
    Vein from Lungs
    Vein from Head and Body
    Right Atrium
    Left Atrium
    valve
    Right Ventricle
    Left Ventricle
  • 4. Function of the Circulatory System
    In Respiration:
    Delivers oxygen to the cells and removes carbon dioxide
  • 5. Function of the Circulatory System
    In Nutrition:
    • Carries digested food substances to the cells of the body
  • Function of the Circulatory System
    In Excretion:
    Disposes waste products and poisons that would harm the body if gets accumulated.
  • 6. Function of the Circulatory System
    Other Functions
    Protects body from diseases
    WBCs ( White Blood Cells) engulf and destroys bacteria, viruses, and other harmful invaders
    Keeps the body temperature stable
    Helps carries hormones
  • 7. 3 Types of Blood Vessels
    ARTERY
    - a blood vessel that carries blood from the heart to the body.
  • 8. 3 Types of Blood Vessels
    2. VEIN
    - a blood vessel that carries blood from capillaries toward the heart.
    - Carries blood that contains waste and CO2
    Exception pulmonary vein
    Blood not under much pressure
    Valves to prevent much gravity pull
    Venules: larger than capillaries
  • 9. 3 Types of Blood Vessels
    3. CAPILLARY
    - a smaller blood vessel connecting arterioles with the ventricles or ventrioles
    • Smallest vessel
    • 10. Microscopic
    • 11. Nutrients and gases diffuse here
    • 12. Walls one cell thick
  • Composition of a Blood
    white blood cell
    red blood cell
    platelets
    plasma
  • 13. Red Blood Cell
    • A biconcave disc that is round and flat withoutanucleus
    • 14. Contains hemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it.
    • 15. Can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries.
  • White Blood Cell
    • The two main ones are the lymphocytes and the macrophages.
    • 16. Macrophages ‘eat’ and digest micro-organisms .
    • 17. Lymphocytes fight disease by making antibodies to destroy invaders by dissolving them
  • Platelets
    Platelets are bits of cell broken off larger cells
  • 18. Overview of the Circulatory System