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The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail and pharyngeal slits. It is a hollow cord dorsal to the no â¦ tochord.ike humans, A dorsal nerve cord would be present on the back of the person or chordate. Some invertebrates such as arthropods, have a ventral nerve cord on the belly..
It is believed that mammals detect pheromones through an organ in the nose called the VNO (Vomeronasal Organ), and connects to the hypothalamus in the brain. The VNO in humans consists of just pits that probably do not do anything. If humans do respond to hormones, most likely they use their normal olfactory system.o humans have pheromones? 1  Releaser pheromones-they elicit an immediate response, the response is rapid and reliable. 2  Primer pheromones-these take longer to get a response. 3  Signaler pheromones-these provide information. 4  Modulator pheromones-they can either alter or synchronize bodily functions.