LAB EX. 1 CIRCULATORY

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julianne.elizabeth
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170716
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LAB EX. 1 CIRCULATORY
Updated:
2012-09-20 01:37:05
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HEART VEINS ARTERIES VESSELS BLOOD FLOW
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LCCC Ciotti A&P II Lab 1 exam Circulatory System
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  1. Describe the Pulmonic (Pulmonary) System
    Rigght side of heart to lungs
  2. Describe the Systemic System
    Lungs to left side of heart to body (Includes the hemopatic portal system)
  3. Describe how blood flows through the heart, including the vessels, chambers, and valves
  4. Describe the Layers and Muscles of the Heart
    Epicardium, Myocardium, Endocardium

    Epicardium: Parietal Layer (Serous Tissue), Visceral Layer (1 layer of simple squamous epithelium)

    Pectinate Muscles: found in right and left atria

    Papillary Muscles: found in ventricles, chordae tendinae anchor valves to papillary muscles

    Trabeculae: thick bands in Venticles
  5. Name the ventricles, valves, and vessels (note where auricles would be located!)
    • Aorta and Pulmonary valves are SEMI LUNAR (2 FLAPS)
  6. Name the blood vessels on the outside of the heart (Feed the myocardium)
    • Name: Great Cardaic Vein, Anterior interventricular artery (interventricular sulcus), right and left coronary arteries, circumflex artery, pulmonary trunk, pumlmonary veins, aorta, SVC, IVC, Coronary Sinus
  7. Complete
    • 1. Right Atrium
    • 2. Pumlmonary Semi-Lunar Valve
    • 3. Tri-cuspid Valve
    • 4. Cordae Tendinae
    • 5. Papillary Muscles
    • 6. Right Ventricle
    • 7. Interventricular Septum
    • 8. Epicardium
    • 9. Myocardium
    • 10. Left Ventricle
    • 11. Bi-cuspid (mitral) valve
    • 12. Aortic Semi-Lunar Valve
    • 13. Left Atrium
  8. Describe the Coronary Sinus and Vessels
    SUPPLY BLOOD TO THE HEART ITSELF

    Coronary Sinus: collects coronary venous blood, leads into the right atrium inferior to SVC

    2 Coronary Arteries, R/L: right above ASL Valve, lead to coronary vessels supplying the blood to the heart
  9. What are the remnants of fetal heart development?
    Ligamentum Arteriosum: Remnant of the Ductus Arteriosus between Pulmonary Trunk and Aorta

    Fossa Ovalis: interatrial septum, remnant of fetal blood passageway
  10. What is this?
    Moderator Band: connects the right ventricular walls
  11. Label and Explain the electricl pathway
    • SA node is the pacemaker
  12. Name the two layers of the pericardial sac
    Fibrous layer, visceral layer
  13. Define Ischemia and Anemia
    Ischemia: insufficient blood flow

    Anemia: hypoxia
  14. Name the different layers of blood vessel wall
    • Tunica Externa (Adventitia)
    • Tunica Media
    • Tunica Intima
  15. Describe the difference between arteries and veins
    • Arteries: carry O2 and nutrients to body cells
    • -thicker walls than veins due to higher BP
    • -tunica media is thicker due to increased smooth muscle and/or elastic
    • -tunica intima is scallaped layer of simple squamous
    • -lumen is smaller and rounder than in veins

    • Veins: carry CO2 and waste products, low O2 levels (Except pulmonary veins)
    • -entire wall is thinner due to lower BP
    • -larger veins have one-way SL valves
    • -lumen and larger and very irregular
    • -tunica intima is a smooth layer of simple squamous
    • -greater number of veins than arteries, esp superficially
  16. Why are valves found in veins but not arteries?
    The low pressure of the veins makes it more difficult for the blood to get back to the heart.

    The blood must flow through the veins AGAINST gravity

    Valves prevent the backflow of blood!

    (skeletal muscle "pump" and breathing also aide in milking the blood back to the heart)
  17. How are the arteries of pulmonary ciruclation different from those of the systemic system?  What condition is indicated by this anatomical difference?
    The systemic arteries are much thicker because of the increased pressure to supply blood to the whole body

    This anatomical difference is indicated by the elastic recoil in systemic arteries
  18. Distinguish between the artery and vein
    Artery is on the left, vein on the right.
  19. What is this?
    Capillary- allows for one RBC at a time

    Only a singe layer of simple squamous endothelium (with basal lamina)
  20. What is this?
    Csrdisc muscle: striated with intercalated discs
  21. Label
  22. What is the function of the Circle of Willis?
    Main blood supply to the brain- arterial anastomosis at the base of the brain surrounding the pituitary gland the optic chiasma

    If one part gets blocked, there are others to do the work.  Like the coronary arteries, this makes sure the brain gets a sufficient blood supply.
  23. Label
  24. Label

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