Page 1 of 49 - About 482 Essays
  • Difference Between Ventilation And Perfusion

    Ventilation and perfusion work together in the body to provide oxygen and dispose of carbon dioxide. Ventilation provides tissue and organs oxygen by the process of mechanical inspiration and exhalation of the lungs. This provides the alveoli within the lungs with oxygen, as well as the ability to expel waste products like carbon dioxide. Perfusion provides the tissues and organs with oxygen by the mechanism of diffusion between the pulmonary capillaries and alveoli. Ventilation Ventilation is the movement of air in and out of the lungs, also known as inspiration and expiration as previously stated. Respirations are controlled by the medulla oblongata in the brain. The medulla oblongata initiates the signal for the respiratory muscles to…

    Words: 1162 - Pages: 5
  • Oxygen Supply And Respiratory System

    Diffusion across this pressure gradient is so effective that the capillary blood is fully oxygenated by the time it has passed through 1/3rd of the alveolar capillary network (Grossman & Porth, 2014). Ficks law of diffusion describes the relationship between factors that influence diffusion rates. It can be used to look at diffusion between the alveoli and this pulmonary capillary network. These factors include the partial pressure difference of gas (p1-p2), the thickness (T) and surface area…

    Words: 2258 - Pages: 10
  • Capillary Bridge Research Paper

    This section will discuss capillary bridges in more detail. Capillary bridges are formed under the influence of capillary action, which will be discussed first. Also the forces caused by capillarity are briefly discussed. Next, the characteristics of the particles and their effect on the shape of the bridge are discussed. This is followed by the mechanism of capillary bridge breakup. Finally the process of capillary bridge formation by condensation is discussed. 2.1.1. CAPILLARY ACTION Liquids…

    Words: 1359 - Pages: 6
  • The Results Of Air Permeability, Total Water Absorption, And Mortars

    mortars. The geopolymer binders with WTS and the additional RHA became the mortars more consistent and difficult to mix and mold, and the entrapped air remained in the mortars. Fig. 7 shows the capillary water absorption. The higher the WTS content in the mixture, the lower the capillary water…

    Words: 759 - Pages: 4
  • Values For The Height Of N-Butanol Solutions In Capillary Tube

    Cohesion is the attraction of molecules within the same phase while adhesion refers to the attraction of molecules of different phases; say the n-butanol solution and the walls of the capillary tube. If the adhesion force is stronger than the cohesion force, the walls of the capillary tube will be wet, which in turn attracts molecules from the bulk of the solution upward until the pressure exerted from outside (environment) of the capillary tube is equal to the forces that lifts the solution…

    Words: 1224 - Pages: 5
  • Melting Point Lab Report

    Many substances have similar melting point as the unknown substance. However, in order to determine if the unknown compound is a pure known compound, we need to mix the two substance together. If the melting point of the mixture is lower than the original known compound than the unknown substance is not a pure compound. If the substances are the same, the melting point will be the same as what we have observed and recorded. In order to test purity of compound, we need to place both the unknown…

    Words: 732 - Pages: 3
  • Cyclograosus Essay

    in the experiment where capillary tubes were used to collect samples of the seawater and blood, then frozen and put into an alcohol bath. The melting points of each sample was then observed…

    Words: 1575 - Pages: 7
  • Lymphatic System Research Paper

    also surrounded with continuous basement membrane (13). Consequently, the collecting lymphatic lack the ability of absorbing interstitial fluid compared with initial lymphatic capillaries and precollecting lymphatics. The second layer consists of a muscle bundle arranged in hellicoidal fashion (7). The outermost layer is the adventitia that consists of fibrous tissue. Collecting lymphatic vessels characterized also by the presence of valves. The valve leaflets consist of collagen fibers covered…

    Words: 1967 - Pages: 8
  • Human Gaseous Exchange Essay

    Because the lungs have no skeletal muscles of their own, so the work of breathing is done by the diaphragm, the diaphragm helps to pump the carbon dioxide out of the lungs and pull the oxygen into lungs. They are two very important adaptations in human gas exchange system that allows the human to survive successfully in their living environment. The first and most important part of gas exchange is the alveoli, alveoli are tiny membrane sacs that allow gas exchange of oxygen and carbon dioxide…

    Words: 956 - Pages: 4
  • Hemorheology Essay

    It is a specialized part of fluid mechanics and is concerned primarily with non-Newtonian substances like Blood. Blood is a vital fluid found in human beings and other animals. It contains many chemical compounds to perform various functions. Healthy blood varies in viscosity as it flows normally and becomes much “thinner” by the time it reaches the capillaries. From a hemorheological point of view, fluids can be divided into two main groups (1) Newtonian fluids, (2) Non-Newtonian…

    Words: 2285 - Pages: 10
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