Cardiovascular Practical Flashcards
the two components of blood
plasma and formed elements
RBCs are also called
erythrocytes
WBCs are also called
leukocytes
platelets are known as
thrombocytes
formed elements make up about ____% of blood volume
45%
plasma makes up about _____% of blood volume
55%
plasma minus the clotting proteins
serum
large molecule used to transport oxygen and carbon dioxide in the blood
hemoglobin
abnormally high number of RBCs
polycethemia
unusually low number of RBCs
anemia
neutrophils, eosinophils, basophils
granular leukocytes
lymphocytes and monocytes
agranular leukocytes
phagocytes that engulf and kill bacteria
neutrophils
neutralize the effect of histamine in allergic reactions, phagocytize antigen-antibody complexes, and destroy parasitic worms
eosinophils
release histamine, heparin, and serotonin during allergic reactions
basophils
involved in immune response and include B cells, T cells, and natural killer cells
lymphocytes
develop into plasma cells which secrete antibodies that attack bacteria
B cells
attack virus-infected cells, cancer cells, and transplanted tissue cells
T cells
attack a wide variety of microbes
Natural killer cells
transform into macrophages that are the man phagocytic cells
Monocytes
abnormally high number of WBCs
leukocytosis
decrease in the number of WBCs
leukopenia
platelets are formed in red bone marrow from large, multinuclear cells called
megakaryocytes
a deficiency in the number of circulating platelets
thrombocytopenia
most numerous WBC
neutrophil
second most numerous WBC
lymphocyte
largest WBC
monocyte
performed to determine the percentage of each of the five types of WBCs in a blood sample
differential WBC count
determines the volume of RBCs described as the percentage of RBCs in a whole blood sample
Hematocrit
protein that carries oxygen in the RBCs
Hemoglobin
process of blood clotting
coagulation
blood typing is based on the _____ molecules that are on the surface of RBC membranes
antigenic
plasma proteins that combine with a specific antigen to inhibit or destroy it
antibodies
a substance that is able to produce an immune response and will react with a specific antibody
antigen
agglutinate
clump
When an Rh- mother is carrying an Rh+ child, this is known as
hemolytic disease of the newborn
antisera
antiserum
upper chamber
atrium
lower chamber
ventricle
pouch-like extensions of atria
auricles
grooves that externally mark the boundaries between the four heart chambers
sulci
deep sulcus that externally shows the separation of the atria and the ventricles
coronary sulcus
shallow grooves that depict the surface boundaries between the two ventricles
anterior & posterior interventricular sulcus
returns blood from the head, neck and arms
superior vena cava
returns blood from the body inferior to the heart
inferior vena cava
smaller vein that returns blood from coronary circulation
coronary sinus
only vessel that removes blood from the right ventricle
pulmonary trunk
the pulmonary trunk divides into the
right and left pulmonary arteries
O2 rich blood returns to the left atrium through the
right & left pulmonary veins
the left ventricle pumps blood into the
aorta
the fetal heart contains a short, temporary vascular channel, the ________
ductus arteriosus
after birth, the ductus arteriosus becomes the
ligamentum arteriosum
myocardial ridges
pectinate muscles
separates the walls of the right and left atria
interatrial septum
in fetus, the hole in the interatrial septum is called:
foramen ovale
the connective tissue membrane that forms over the foramen ovale after birth
fossa ovalis
ridges of muscles in ventricles
trabeculae carnae
finger-like projections
papillary muscles
heartstrings
chordae tendinae
right atrioventricular valve
tricuspid valve
left atrioventricular valve
bicuspid valve
takes blood from the right ventricle to the lungs and back to the left atrium
pulmonary circulation
takes blood from the left ventricle to body tissues and back to the right atrium
systemic circulation
the walls of the heart have their own supply and circulation, the ______ circulation
coronary
attaches to the diaphragm and great vessels of the heart, secures the heart in the mediastinum
fibrous pericardium
double membrane composed of an outer parietal layer and inner visceral layer
serous pericardium
enable action potentials to spread quickly from cell to cell
gap junctions
the internal stimulation that makes the heart beat by itself
intrinsic stimulation
intrinsic stimulation is caused by specialized, noncontractile cells called
autorhythmic cells
the pacemaker
sinoatrial node
P wave
atrial depolarization
QRS Complex
ventricular depolarization
P-Q Interval
represents time it takes for electrical conduction to travel through the atria and AV node to the Purkinje fibers
S-T segment
segment from the end of the S to the beginning of the T wave
Q-T Interval
beginning of ventricular depolarization to the end of ventricular repolarization
normal sinus rhythm
60-100 bpm
a heart rate above 100beats/min
tachycardia
a heart rate below 60beats/min
bradycardia
prolonged tachycardia can develop into
ventricular fibrillation
listening to body sounds
auscultation
closure of the two AV valves at systole
lubb
ventricular diastole when semilunar valves close
dubb
arteries divide into smaller vessels called
arterioles
arterioles branch into the tiniest vessels called
capillaries
capillaries join to form
venules
venules merge to form
veins
arteries carry oxygen-rich blood to body tissues
systemic circulation
arteries carry oxygen-poor blood from the right ventricle to the lungs
pulmonary circulation
composed mainly of elastic and collagen fibers
tunica externa
middle and thickest layer, contains elastic fibers and smooth muscle layers
tunica media
contraction of smooth muscle fibers causes a decrease in lumen diameter
vasoconstriction
relaxation of smooth muscle fibers causes an increase in lumen diameter
vasodilation
simple squamous epithelium
tunica interna
large-diameter arteries that have more elastic fibers in their tunica media
elastic arteries
smaller in diameter and have more smooth muscle fibers and fewer elastic fibers in their tunica media
muscular arteries
prevents the backflow of blood
valves
fusion of plasma membranes of adjacent cells
tight junctions
spaces between cells
intercellular clefts
pores in plasma membrane covered by diaphragm
fenestrations
molecules can be transported across capillary walls by vesicles, a process called
transcytosis
pressure exerted by blood against blood vessel walls
blood pressure
difference in blood pressure between two areas of circulatory system
blood pressure gradient
contraction
systole
relaxation
diastole
sphygmomanometer
measures arterial blood pressure
sound caused by turbulent flow of blood
Korotkoff sounds
can be measured directly with a pressure transducer interted into venous vessel
Venous blood pressure
difference between the systolic and diastolic blood pressure
Pulse Pressure
provide alternate routes or detours for blood flow in case the main route is blocked or damages
anastomoses
longest vein in the body, running along the medial surface of the leg and thigh
great saphenous vein