<prompt> Jacobsons organ isFunnel shapedAlong with nasopalatine ducts are called as auillary olfactory sense organsExtends form eyes to oral cavityAll of the above  <response>: In most mammals the nasopalatine ducts are patent and together with Jacobsons organs, are considered as auxiliary olfactory sense organs.Jacobsons organ is a small ellipsoid cigar shaped structure lined with olfactory epithelium that extends from the nose to the oral cavity. 