parietal serosa serous membrane parietal pleura parietal pericardium visceral serosa Visceral pleura visceral peritoneum serous fluid parietal peritoneum Visceral pericardium is any membrane of the ventral cavity separated from other membranes by on the surface of a lung is called lound on any ventral cavity organ surface is called found on any ventral cavity wall is called on the abdominopelvic cavity walls is called on the surface of the heart is called forming a cavity for the heart is called on the walls of a cavity housing a lung is called on the surface of most abdominopelvic organs is called​

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).