When we say an animal has an "open circulatory system," this means that: movement of the animal is solely responsible for moving circulatory fluid. a small amount of blood may leak out of vessels. there are no vesselsblood simply fills all spaces inside the coelom. the animal has a single-chambered heart, so blood mixes from all areas. blood flows out of vessels and into spaces or sinuses?

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

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).

Why is taking care of yourself a time management techique