Blood

CATEGORY OF BLOOD VARIATION IN SHAPE “POIKILOCYTOSIS” PRINCESS ALEN AGUILAR  

The mitral valve (or bicuspid valve) separates the left atrium and left ventricle. Its function is to close as the heart contacts (i.e. when pressure increases in the ventricle) to prevent blood...  

The task of maintaining an adequate interstitial homeostasis (the proper nutritional environment surrounding all cells in your body) requires that blood flows almost continuously through each of the millions of capillaries in the body. The following is a brief description of the parameters that govern flow through a given vessel. All bloods vessels have certain lengths (L) and internal radii (r) through which blood flows when the pressure in the inlet and outlet are unequal (Pi and Po respectively); in other words there is a pressure difference (ΔP) between the vessel ends, which supplies the driving force for flow. Because friction develops between moving blood and the stationary vessels walls, this fluid movement has a given resistance (vascular), which is the measure of how difficult it is to move blood through a vessel. One can then describe a relative relationship between vascular flow, the pressure difference, and resistance (i.e., the basic flow equation):  

Reducing the Atherogenic Burden Molecular Disease Branch National Heart, Lung and Blood Institute National Institutes of Health Bethesda, Maryland  

Need help with your Anatomy and Physiology I homework? In this animated and interactive object, learners examine ABO blood antigens and Rh antigens and their compatibility.  

Add a drop of anti-Rh antibodies (anti-D serum) to a drop of blood on a slide labeled Rh.  The Rh negative blood (shown above) will not clump, while the Rh positive blood (below) will show clumping:  

Adrenaline (epinephrine) has been an integral component of advanced resuscitation algorithms since the early 1960s. Initial guidelines for the treatment of cardiac arrest recommended the use of intracardiac adrenaline (0.5 mg) or high dose intravenous adrenaline (10 mg), repeating with larger doses if required.1 The mechanism of action for adrenaline in cardiac arrest is attributed to stimulation of α2 receptors in vascular smooth muscle, causing vasoconstriction. This increases aortic diastolic pressure, which in turn leads to increased coronary perfusion pressures, which improves short term survival. Experimental studies, however, suggest that adrenaline impairs cerebral macrovascular2 and microvascular blood flow,3 4 increases ventricular arrhythmias, and increases myocardial dysfunction after return of spontaneous circulation.5 This creates the paradox of better short term survival but at the potential cost of worse long term outcomes.  

Objective To determine the relative risks of prostate cancer incidence, metastasis, and mortality associated with screening by serum prostate specific antigen (PSA) levels at age 60.  

 

This is a cool video teaching the basics of analysing an ABG in 5 min  

Eisenmenger's syndrome is when blood in the heart shunts from right-to-left due to increased pressure in the right ventricle. This increased pressure is usua...  

Acyanotic heart disease is a group of heart conditions where blood with oxygen mixes with blood with little oxygen in the heart. This mixing is not enough to...