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  2. Hemodynamics - Wikipedia

    en.wikipedia.org/wiki/Hemodynamics

    Blood resistance varies depending on blood viscosity and its plugged flow (or sheath flow since they are complementary across the vessel section) size as well, and on the size of the vessels. Assuming steady, laminar flow in the vessel, the blood vessels behavior is similar to that of a pipe.

  3. Circulatory system - Wikipedia

    en.wikipedia.org/wiki/Circulatory_system

    The circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. [ 1 ] [ 2 ] It includes the cardiovascular system , or vascular system , that consists of the heart and blood vessels (from Greek kardia meaning heart , and from Latin ...

  4. Hydrography - Wikipedia

    en.wikipedia.org/wiki/Hydrography

    Table of geography, hydrography, and navigation, from a 1728 Cyclopaedia.. Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities ...

  5. Venous return - Wikipedia

    en.wikipedia.org/wiki/Venous_return

    Venous return (VR) is the flow of blood back to the heart. Under steady-state conditions, venous return must equal cardiac output (Q), when averaged over time because the cardiovascular system is essentially a closed loop. Otherwise, blood would accumulate in either the systemic or pulmonary circulations.

  6. Cardiovascular physiology - Wikipedia

    en.wikipedia.org/wiki/Cardiovascular_physiology

    Blood flow through the left coronary artery is at a maximum during diastole (in contrast to the rest of systemic circulation, which has a maximum blood flow during systole.) splanchnic circulation: 15%: low: Flow increases during digestion. hepatic circulation: 15%: Part of portal venous system, so oncotic pressure is very low renal circulation ...

  7. Hemorheology - Wikipedia

    en.wikipedia.org/wiki/Hemorheology

    Blood viscosity is a measure of the resistance of blood to flow. It can also be described as the thickness and stickiness of blood. This biophysical property makes it a critical determinant of friction against the vessel walls, the rate of venous return, the work required for the heart to pump blood, and how much oxygen is transported to tissues and organs.

  8. Local blood flow regulation - Wikipedia

    en.wikipedia.org/wiki/Local_blood_flow_regulation

    Pulmonary (lung) circulation undergoes hypoxic vasoconstriction, which is a unique mechanism of local regulation in that the blood vessels in this organ react to hypoxemia, or low levels of dissolved oxygen in blood, in the opposite way as the rest of the body. While tissues and organs tend to increase blood flow by vasodilating in response to ...

  9. Microcirculation - Wikipedia

    en.wikipedia.org/wiki/Microcirculation

    The endothelium provides a smooth surface for the flow of blood and regulates the movement of water and dissolved materials in the interstitial plasma between the blood and the tissues. The microcirculation contrasts with macrocirculation, which is the circulation of blood to and from the organs.