If it appears to be a fuzzy material or a woven fabric (usually white, but can also be gray, black, or brown), its vinyl. If it looks like suede, its probably leather. If you already own a leather/vinyl match, pay careful attention to your conditioning regimen.
The left kidney, small intestine and descending colon are all found at the lower left side of the back, also known as the left lumbar region.
The spleen is a non-vital organ located in the left upper quadrant of the abdominopelvic region. It is the largest lymphatic organ, acting as a site of lymphocyte proliferation and in immune surveillance and response. In the fetus, it is a hematopeotic organ.