A portion of the stomach, showing its internal surface or mucous coat. Mucous membranes line various cavities of the body, which are exposed to the air.
Lee, Charles A. Human Physiology for the Use of Elementary Schools, 11th ed. (Buffalo: J. C. Derby & Co., 1847) 32
2185×2400, 2.9 MiB
932×1024, 372.2 KiB
582×640, 179.9 KiB
291×320, 55.2 KiB