They serve the body as a natural filter of the blood, and remove water-soluble wastes which are diverted to the bladder. In producing urine, the kidneys excrete nitrogenous wastes such as urea and ammonium. They are also responsible for the reabsorption of water, glucose, and amino acids. The kidneys also produce hormones including calcitriol and erythropoietin.
Definition of skeg. 1  1 : the stern of the keel of a ship near the sternpost; especially : the part connecting the keel with the bottom of the rudderpost in a single-screw ship. 2  2 : a fin situated on the rear bottom of a surfboard that is used for steering and stability.
JPEG (Joint Photographic Experts Group). It works well on photographs, naturalistic artwork, and similar material; not so well on lettering, simple cartoons, or black-and-white line drawings (files come out very large). JPEG handles only still images, but there is a related standard called MPEG for motion pictures. JPEG is lossy, meaning that the image you get out of decompression isn't quite identical to what you originally put in. The algorithm achieves much of its compression by exploiting known limitation of the human eye, notably the fact that small colour details aren't perceived as well as small details of light-and-dark.