Very thin foil. It can be large in 2D as pool foil, or rolled-up to 3D space like in the AA cell or electrolytic capacitor. A pasta shapes are also good example, how to have minimal volume and maximal surface to get it boiled quickly.
Root hair cell maybe?
That one!
greatest benefit to health, people should have both soluble and insoluble fiber in their diet, preferably in a 50:50 ratio. The following foods are good sources of
There are about 120 million rod cells compaired to 6 million cone cells, for a ratio of about 20 rods for each cone.
in any given mm3 of blood, what is the approximate ratio of the number of red blood cells (erythrocytes) to white blood cells (leukocytes)
individual cells grows in size, but there are limits to the size that cells can reach. cells need a high ratio of surface area to volume in order to function. as a cell grows, that ratio decreases. when the cell divides into two smaller cells, the ratio of surface area to volume for each cell increases.
If the cells in question are roughly spherical, then a small cell has a larger surface-area-to-volume ratio (SVR) (for spheres, the ratio is SVR = 3/r where r is the radius of the sphere; http://en.wikipedia.org/wiki/Sphere). However, most cells are not spheres. As a result, the answer is, "It depends." For example, some motor neurons are over a meter long (see http://en.wikipedia.org/wiki/Efferent_nerve), and Purkinje cells in the cerebellum have elaborate branching patterns in their dendritic arbors (see http://en.wikipedia.org/wiki/Purkinje_cell). The longer a cell is and the more branches it has, the higher the surface area, while the volume does not change nearly as much. By contrast, red blood cells are like deflated balls -- their surface area is not too different from that of a sphere of the same radius. They have a far lower SVR than neurons of the same volume. You can see that even the words "small cell" and "large cell" are imprecise; it depends on whether you're measuring the cell's length (and in which direction!), or its volume, or something else.
greatest benefit to health, people should have both soluble and insoluble fiber in their diet, preferably in a 50:50 ratio. The following foods are good sources of
greatest benefit to health, people should have both soluble and insoluble fiber in their diet, preferably in a 50:50 ratio. The following foods are good sources of
Surface area to volume ratio
its simplest form.
there is about a 1000 to 1 to 2000 to 1 ratio of RBCs to WBCs
There are about 120 million rod cells compaired to 6 million cone cells, for a ratio of about 20 rods for each cone.
That is what I am wondering!
in any given mm3 of blood, what is the approximate ratio of the number of red blood cells (erythrocytes) to white blood cells (leukocytes)
23 chromosomes for every 1 sex cell??
In 1cm3 of blood, there are 5,000,000,000 red blood cells and 8,000,000 white blood cells. Meaning a ratio of 5000 to 8.
warm air
paradise