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45 Cards in this Set

  • Front
  • Back

Three interrelated components of Cardiovascular System

- blood


- heart


- blood vessels

a liquid connective tissue

Blood

water liquid extracellular matrix

Blood Plasma

Formed Elements of Blood Plasma

- Red Blood Cells


- White Blood Cells


- Platelets

- aka Erythrocytes


- contain oxygen-carrying protein hemoglobin


- lacks nucleus and other organelles


- live only about 120 days

Red Blood Cells

- aka Leukocytes


- have nuclei


- do not contain hemoglobin


- general function to combat invaders by phagocytosis or immune responses

White Blood Cells

Types of white Blood Cells

Basophils and Eosinophils

intensify inflammatory reaction

Basophils

release histaminase

Eosinophils

major soldiers of the immune system

Lymphocytes

bacteria and toxins

B cells

viruses, fungi, transplanted and cancer cells

T Cells

infectious microbes and certain tumor cells

Natural Killer (NK) Cells

- aka Thrombocytes


- splinters into 2000-3000


- disc-shaped w/ many vesicles but no nucleus


- help stop blood loss by forming platelet plug


- 5-9 days life span

Platelets

blood has only Antigen A

Type A

blood has only Antigen B

Type B

- blood has antigens A and B


- universal recipients

Type AB

- blood has neither antigen


- universal donor

Type O

- located at the mediastinum


- apex at tip of the left ventricle


- base is posterior surface

Heart

Membrane surrounding and protecting the heart

Pericardium

2 main parts of Pericardium

- Fibrous


- Serous

reduces friction; secreted into pericardial cavity

Pericardial Fluid

Layers of the Heart wall

- Epicardium


- Myocardium


- Endocardium

Smooth, slippery texture to outermost surface

Epicardium

95% of heart is cardiac muscle

Myocardium

Smooth lining for chambers of heart

Endocardium

Chambers of the Heart

2 atria and 2 ventricles

Heart Valve

- Atrioventricular Valves


- Semilunar Valves

Atrioventricular Valves

- Tricuspid Valve


- Bicuspid Valve

Semilunar Valves

- Aortic Valve


- Pulmonary Valve

Bicuspid Valve Strings

Chordae Tendinae

Specialized Cardiac Muscle Fibers

Autorhythmic Fibers

acts as pacemaker of the heart

Sinoatrial Node

5 main types of Blood Vessels

- Arteries


- Arterioles


- Capillaries


- Venules


- Veins

carry blood away from the heart

Arteries

carry blood to the heart

Veins

Basic Structure of Blood Vessel
(3 layers)

- Tunica Interna


- Tunica Media


- Tunica Externa

decrease in lumen diameter

Vasoconstriction

increase in lumen diameter

Vasodilation

Conduction System

- Sinoatrial Node


- Atrioventricular Node


- Purkinje Fibers

Two kinds of Circulation

- Systemic


- Pulmonary

Two Types of Blood Vessel (flow)

- Vasoconstriction


- Vasodilation

Largest Artery

Aorta

Largest Vein

Vena Cava (Superior & Inferior)

Blood Circulation in the Heart