CIRCULATORY Flashcards Preview

HESI ANATOMY > CIRCULATORY > Flashcards

Flashcards in CIRCULATORY Deck (25)
Loading flashcards...
1

Percentage of blood composition

55% plasma
45% of formed elements: erythrocytes, leukocytes, and platelets

2

All of the formed elements are produced from

the stem cells in the red bone marrow

3

Characteristics of Blood:

sticky, opaque
ruby red- scarlet color
7.35- 7.45 pH
38 degrees Celsius
5-6L males 4-5L females

4

Erythrocytes:

biconcave shape
97% hemoglobin, deliver oxygen
anaerobic respiration ,do not use o2
anucleate

5

RBC percentage

hematocrit

6

Leukocytes:

complete cells
important role in the immune system
Agranulocytes and Granulocytes
active in phagocytosis

7

Agranulocytes include

lymphocytes T&B immune system
monocytes (macrophages)

8

Granulocytes include

neutrophils (bacterial slayer)
eosinophiils (parasitic worms)
basophils (rarest, histamine)

9

Platelets:

cell fragments
key role in clotting formation

10

Glycoproteins and glycolipids markers are called ( what we have)

antigens and agglutinogens

11

The XXXXX act against RBC's carrying ABO antigens that we do not have

antibodies and agglutinins

12

PATHWAY OF THE DOUBLE PUMP HEART:

superior & inferior vena cava & coronary sinus
Right atrium
Tricuspid valve
right ventricle
pulmonary SL valve
Pulmonary trunk
lung
Pulmonary veins
left atrium
Bicuspid valve
Aortic SL valve
Aorta
Body

13

Blood is supplied to the hear by

coronary arteries

14

The heart has an intrinsic beat initiate by the

sinoatrial node

15

the period from the end of one ventricular contraction to the end of the next ventricular contraction

the cardiac cycle

16

the contraction phase of the cycle

systole

17

the relaxation phase of the cycle

diastole

18

The vascular system includes

arteries (away from the heart)
veins (toward the heart)
capillaries (exchange, smallest vessels)

19

the smallest arteries are called

arterioles

20

Layers of the Vessels

tunica intima (endothelial lining)
tunica media (smooth muscle)
tunica externa (collagen fibers)

21

Wall of arteries:

thick and elastic
high pressure

22

Walls of veins:

thinner and less elastic
low pressure

23

What results from the contraction and relaxation of smooth muscles in the arterial walls?

vasoconstriction and vasodilation

24

True or False: The ECG reflects the systole and diastole of the heart chambers.

False: they represent the electrical activity that precedes the contraction-relaxation of the myocardium

25

Order of Electrical Events:

Sinoatrial node (pacemaker)
Atrioventricular node
Atrioventricular (bundle of HIS)
right and left branches
purkinje fibers