Certification 2 Flashcards
(141 cards)
Circulatory System
Delivers o2, nutrients, hormones, and enzymes to the cells; transports cellular waste to organs where they can be expelled. Blood is vehicle; blood vessels, tubes, and heart work as pump.
Pulmonary circulation
carries deoxygenated blood from right ventricle to lungs to left atrium.
Systemic circulation
Carries oxygenated blood from left ventricle throughout the body
Valves
Tricuspid, bicuspid(mitral), aortic, and pulmonic
Tricuspid
Atrioventricular valve that is between right atrium and right ventricle
Bicuspid(mitral)
Atrioventricular valve between left atrium and right ventricle
Aortic valve
Semi lunar valve between left ventricle and aorta
Pulmonic valve
Semi lunar valve between right ventricle and pulmonary artery
Endocardium
Inner layer lining of heart
Myocardium
Muscular middle layer
Epicardium
Fibrous outer layer; coronary arteries that supply blood to heart are found here
How many liters of blood does average adult have?
5-6 liters
Layers of blood vessels
Tunica adventitia
Tunica media
Tunica intima
Tunica adventitia
Outer connective tissue layer
Tunica media
Middle smooth muscle
Tunica intima
Inner endothelial layer
Capillaries
Composed of a layer of endothelial cells and are a mix of arterial blood and venous blood
Order of draw for capillaries
Lavender
Tubes with other additives
Tubes without additives
Erythrocyte
Start as immature reticulocytes; in 1-2 days mature; there are 4.2-6.2 million RBCs per microliter. Life span is 120 days; contain hemoglobin/oxygen carrying protein.
Leukocytes
Body’s protection from infection/illness; average adult has 5,000 10,000 wbc
Neutrophils
Comprise 40-60% of WBCs; phagocytic and engulf and digest bacteria
Lymphocytes
20-40% of WBCs; immunity
Monocytes
3-8% of WBCs; largest WBCs; they’re monocytes in circulating blood, but when absorbed in tissues transform to macrophages(extremely powerful phagocytes); increase with intracellular infection
Eosinophils
1-3% of WBCs; active against antibody-labeled foreign molecules. Increase in allergies, skin infection, and parasitic infection