Blood flows through the heart, arteries Arteries Arteries are tubular collections of cells that transport oxygenated blood and nutrients from the heart to the tissues of the body.The SVR and MAP are affected by the vascular anatomy as well as a number of local and neurohumoral factors.įlow, Pressure, and Resistance in Blood Vessels Overview Ventilation: Mechanics of Breathing (SVR). As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow. Cardiac Mechanics (CO) and systemic vascular resistance Resistance Physiologically, the opposition to flow of air caused by the forces of friction. It is usually expressed as liters (volume) per minute so as not to be confused with stroke volume (volume per beat). Measures of Central Tendency and Dispersion arterial pressure (MAP) is the average systemic arterial pressure and is directly related to cardiac output Cardiac output The volume of blood passing through the heart per unit of time. Mean Mean Mean is the sum of all measurements in a data set divided by the number of measurements in that data set. Ventilation: Mechanics of Breathing is directly related to the diameter of the vessel (smaller vessels have higher resistance Resistance Physiologically, the opposition to flow of air caused by the forces of friction. Vascular resistance Resistance Physiologically, the opposition to flow of air caused by the forces of friction. Ventilation: Mechanics of Breathing is the opposition to flow, which is caused primarily by blood friction against vessel walls. Ventilation: Mechanics of Breathing fluid encounters between 2 points. Flow is affected by the pressure gradient and the resistance Resistance Physiologically, the opposition to flow of air caused by the forces of friction. Flow is the movement of volume per unit of time. Veins: Histology in a closed, continuous circuit. Each type contains 3 primary layers: tunica intima, tunica media, and tunica adventitia. Veins are classified into 3 types: small veins/venules, medium veins, and large veins. Capillaries: Histology, and veins Veins Veins are tubular collections of cells, which transport deoxygenated blood and waste from the capillary beds back to the heart. Because a capillary diameter is so small, only 1 RBC may pass through at a time. Capillaries are the smallest of the blood vessels. Arteries: Histology, capillaries Capillaries Capillaries are the primary structures in the circulatory system that allow the exchange of gas, nutrients, and other materials between the blood and the extracellular fluid (ECF). Arteries are classified into 3 types: large elastic arteries, medium muscular arteries, and small arteries and arterioles. The blood passes through the arteries in order of decreasing luminal diameter, starting in the largest artery (the aorta) and ending in the small arterioles. Students: Educators’ Pro Tips for Tough Topicsīlood flows through the heart, arteries Arteries Arteries are tubular collections of cells that transport oxygenated blood and nutrients from the heart to the tissues of the body.Maternity Nursing and Care of the Childbearing Family.
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