Circulatory System Flashcards
Circulatory (vascular) system
Controls the circulation of blood and lymph through the body
Cardiovascular or blood-vascular system
Responsible for circulation of blood
Includes heart, arteries, veins, and capillaries
Lymph - vascular or lymphatic system
Responsible for circulation of lymph
Includes lymph nodes and lymphatic vessels
The heart (circulatory system function)
Encased in pericardium membrane
Contracts and relaxes to move blood
Consists of 4 chambers
Beats 60-100 times per minute
The heart consists of
Pericardium
Right atrium
Left atrium
Right ventricle
Left ventricle
The blood
Circulates through the body as a sticky, salty fluid
Brings nourishment and oxygen to all body parts
Carries toxins and waste products to liver and kidneys to be elliminated
The blood
Circulates through the body as a sticky, salty fluid
Brings nourishment and oxygen to all body parts
Carries toxins and waste products to liver and kidneys to be elliminated
Average amount of blood in adults
8-10 pints
Red blood cells
(Erythrocytes or red corpuscles)
Carry oxygen and contain hemoglobin
Oxygen poor deep scarlet red
Oxygen rich bright red
White blood cells
(Leukocytes or white corpuscles)
Fight bacteria and other foreign substances
Blood platelets
(Thrombocytes)
Responsible for clotting blood
Plasma
Fluid part of blood
90% water
Carries red and white blood cells and blood platelets
Arteries
Tubular, elastic, thick walled
Carry blood from heart
Carry pure blood
Arteries
Tubular, elastic, thick walled
Carry blood from heart
Carry pure blood
Veins
Tubular, elastic, thin walled
Carry blood to heart
Carry impure blood
Valves prevent back flow
Closer to surface than arteries
Blood flow through the heart
Systemic (general) circulation - to heart
Pulmonary circulation - to lungs
Systemic (general) circulation - back to heart and to body