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Lab 2: Blood Pathologies & Heart Anatomy

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  • Anemia

    A condition with decreased red blood cells (RBCs) or reduced hemoglobin concentration.

  • Microcytic

    RBCs that are smaller than normal.

  • Normocytic

    RBCs that are normal in size.

  • Macrocytic

    RBCs that are larger than normal.

  • Hypochromic

    RBCs that appear paler than normal due to less hemoglobin.

  • Normochromic

    RBCs with a normal color and hemoglobin amount.

  • Hyperchromic

    RBCs that appear darker than normal.

  • Pernicious Anemia

    Anemia caused by vitamin B12 deficiency due to lack of intrinsic factor; RBCs are typically macrocytic.

  • Iron-Deficiency Anemia

    Anemia from insufficient iron causing decreased hemoglobin; RBCs are microcytic and hypochromic.

  • Sickle Cell Anemia

    Inherited disorder with abnormal hemoglobin causing sickle-shaped RBCs that block vessels and break down easily.

  • Hemolytic Anemia

    Anemia caused by RBCs being destroyed faster than they are replaced.

  • Chronic Lymphocytic Leukemia (CLL)

    Leukemia with uncontrolled growth of abnormal lymphocytes in blood, bone marrow, and lymph tissues.

  • Eosinophilia

    Increased eosinophils in blood, associated with allergies, parasites, connective tissue diseases, or malignancy.

  • Mediastinum

    Thoracic cavity region between lungs where the heart is located.

  • Pericardium

    Sac surrounding the heart that protects and holds it in place.

  • Parietal Pericardium

    Layer lining the inside of the fibrous pericardium.

  • Visceral Pericardium / Epicardium

    Serous membrane on the heart's outer surface; outermost heart wall layer.

  • Myocardium

    Thick muscular middle layer of the heart wall responsible for contractions.

  • Endocardium

    Inner heart wall layer lining chambers and covering valves.

  • Apex of the Heart

    Pointed inferior tip of the heart, mainly formed by the left ventricle.

  • Base of the Heart

    Broad superior portion where great blood vessels attach.

  • Atrium

    Upper heart chamber that receives blood.

  • Ventricle

    Lower heart chamber that pumps blood out.

  • Right Atrium

    Receives deoxygenated blood from body via superior vena cava, inferior vena cava, and coronary sinus.

  • Left Atrium

    Receives oxygenated blood from lungs via pulmonary veins.

  • Right Ventricle

    Pumps deoxygenated blood to lungs through pulmonary trunk.

  • Left Ventricle

    Pumps oxygenated blood to body through aorta; has the thickest myocardium.

  • Interatrial Septum

    Wall separating right and left atria.

  • Interventricular Septum

    Wall separating right and left ventricles.

  • Fossa Ovalis

    Depression in interatrial septum; remnant of fetal foramen ovale.

  • Pectinate Muscles

    Ridged muscles mainly in atria and auricles.

  • Trabeculae Carneae

    Irregular muscular ridges on inner ventricular walls.

  • Papillary Muscles

    Ventricular muscles attaching to chordae tendineae; prevent AV valves from inverting during contraction.

  • Chordae Tendineae

    Strong cords connecting AV valves to papillary muscles; look like heart strings.

  • Moderator Band

    Muscular band in right ventricle carrying part of the heart's electrical conduction pathway.

  • Right and Left Auricles

    Small ear-like atrial extensions that increase atrial capacity.

  • Tricuspid Valve

    AV valve between right atrium and right ventricle.

  • Bicuspid (Mitral) Valve

    AV valve between left atrium and left ventricle; has 2 cusps.

  • Pulmonary Semilunar Valve

    Valve between right ventricle and pulmonary trunk; prevents backflow into right ventricle.

  • Aortic Semilunar Valve

    Valve between left ventricle and aorta; prevents backflow into left ventricle.

  • Arteries

    Blood vessels carrying blood away from the heart; usually shown red.

  • Veins

    Blood vessels carrying blood toward the heart; usually shown blue.

  • Aorta

    Largest artery; carries oxygenated blood from left ventricle to systemic circulation.

  • Pulmonary Trunk

    Carries deoxygenated blood from right ventricle; divides into right and left pulmonary arteries.

  • Pulmonary Veins

    Carry oxygenated blood from lungs to left atrium; unusual as veins carrying oxygenated blood.

  • Superior Vena Cava

    Large vein returning deoxygenated blood from upper body to right atrium.

  • Inferior Vena Cava

    Large vein returning deoxygenated blood from lower body to right atrium.

  • Brachiocephalic Trunk

    First branch of aortic arch; supplies right head/neck and right upper limb.

  • Common Carotid Arteries

    Arteries supplying blood primarily to head and neck.

  • Subclavian Arteries

    Arteries supplying blood primarily to upper limbs.

  • Ligamentum Arteriosum

    Small ligament connecting pulmonary trunk/left pulmonary artery to aortic arch; remnant of fetal ductus arteriosus.

  • Coronary Circulation

    Heart's own blood supply; coronary vessels deliver and drain blood from myocardium.

  • Coronary Arteries

    Arteries supplying oxygenated blood to the heart muscle.

  • Right Coronary Artery

    Supplies structures on the right side of the heart.

  • Left Coronary Artery

    Supplies much of the left side of the heart; branches into major coronary arteries.

  • Circumflex Artery

    Branch of left coronary artery traveling around left/posterior heart.

  • Marginal Artery

    Branch of right coronary artery running along right margin of the heart.

  • Coronary Sinus

    Large vein on posterior heart collecting deoxygenated blood from myocardium; empties into right atrium.

  • Blood flow through the heart

    Body → Vena Cavae → Right Atrium → Tricuspid Valve → Right Ventricle → Pulmonary Semilunar Valve → Pulmonary Trunk/Arteries → Lungs → Pulmonary Veins → Left Atrium → Mitral Valve → Left Ventricle → Aortic Semilunar Valve → Aorta → Body