Key Terms

Question 1

Plasma

Answer 1

The liquid part of the blood that contains many dissolved substances

Question 2

Erythrocytes

Answer 2

The red blood cells that carry oxygen

Has no nucleus and organelles

Question 3

Hemoglobin

Answer 3

Iron containing protein in red blood cells that carry oxygen

Question 4

Leukocytes

Answer 4

White blood cells that defend the body against bacteria viruses and otherinvaders

Question 5

Formed elements

Answer 5

Erythrocytes,leukocytes,and platelets that makeup 45% of whole blood

Question 6

Phagocytosis

Answer 6

White blood cells engulfing and destroying microorganisms and other foreign or toxic substances

Question 7

Macrophages

Answer 7

Form that monocytes take when they enter infected tissues to engulf and destroy target cells

Question 8

Hematocrit

Answer 8

The ratio of blood formed elements to total blood volume

Question 9

Antigens

Answer 9

Proteins on the surface of red blood cells that determine blood type and the type of antibodies that will be produced in the plasma

Question 10

Antibodies

Answer 10

Proteins produced in the plasma to fight against antigens

Question 11

Agglutination

Answer 11

Clumping that indicates presence of an antigen

Question 12

Buffy coat

Answer 12

Centrifuged platelets and white blood cells

Question 13

Hematocrit

Answer 13

% of RBCs in blood

Question 14

Mediastinum

Answer 14

The middle cavity of the thoracic cavity where the heart is located

Question 15

Epicardium

Answer 15

The outer layer of the heart wall

Question 16

Myocardium

Answer 16

The thick muscular layer of the heart wall that contracts

Question 17

Endocardium

Answer 17

The layer of the heart wall that lines the heart chambers

Deepest

Question 18

Coronary circulation

Answer 18

The blood vessels that supply and drain the myocardium of the heart

Question 19

Atria

Answer 19

The upper chambers that receive blood

Question 20

Ventricles

Answer 20

The lower chambers that discharge blood

Question 21

Atrioventricular valves

Answer 21

The valves that control the flow of blood between the atria and ventricles

Question 22

Semi lunar valves

Answer 22

The valves that control the flow of blood between the ventricles in the large vessels that exit the heart

Question 23

Chordae tendineae

Answer 23

Tenderness chords that anchor the AV valves to prevent them from blowing back up into the atria during ventricular contraction

Question 24

Pulmonary circulation

Answer 24

Blood flow from the heart to the lungs in back to the heart

Question 25

Systemic circulation

Answer 25

Blood flow from the heart to the body in back to the heart

Question 26

Intrinsic conduction system

Answer 26

Electrical system of the heart that sets the basic rhythm it’s composed of the SA node the AV node bundle of His R/L bundle branches and Purkinje fibers

Question 27

SA node

Answer 27

Starts each heartbeat PACEMAKER

Question 28

Systole

Answer 28

Refers to the contraction of the ventricles

Question 29

Diastole 

Answer 29

Refers to the relaxation of the ventricles

Question 30

Cardiac cycle

Answer 30

Includes all the events in heartbeat which include the contraction and relaxation of both atria and ventricles

Question 31

Electrocardiogram

Answer 31

A recording of the flow of electrical impulses that travel through the heart

Question 32

Tachycardia

Answer 32

Rapid heart rate over 100 bpm

Question 33

Myocardial infarction

Answer 33

Heart attack due to lack of blood

Question 34

Atherosclerosis

Answer 34

Narrowing of artenes due to accumulation of plaque

Question 35

Circle of Willis

Answer 35

Circle of connecting blood vessels that protects the veins by providing more than one route for blood

Question 36

Hepatic portal circulation

Answer 36

Came blood from digestive organs and the spleen to the liver to be processed before entering systemic circulation

Question 37

Ischemic stroke

Answer 37

When blood flow is blocked to an area of the brain due to a blood clot

Question 38

Hemorrhage stroke

Answer 38

Bleeding in brain due to a broken blood vessel

Question 39

Cardiomyopathy

Answer 39

Hard to pump blood, left ventricle wall or chamber may enlarge

Question 40

Heart value disease

Answer 40

When heart valve do not close properly in to heart condition, infection, or aging