Unsourced material may be challenged and removed. (June 2013). The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail, an endostyle, and pharyngeal slits. The dorsal nerve cord is a hollow cord dorsal to the notochord.orsal nerve cord is mainly found in subphylum Vertebrata. Dorsal means the back side, as opposed to Ventral which is the front side of an organism. In organisms with Bipedalism dorsal is the back and ventral is the front.
A quad is a rectangular shaped area, especially on a university campus, that's enclosed by buildings. Your college friend might tell you to meet her in the quad after lunch. Quad is an abbreviation, most commonly short for quadrangle, a kind of four-sided courtyard usually defined by a large lawn and surrounded by buildings. Another kind of quad â also an abbreviation â is the large muscle in the top of your thigh, more formally known as a quadriceps muscle. Quadrangle and its nickname, quad, were 1800's Oxford slang, from the Latin root quadri, or four.
The Quad consists of 1 dwarf planet and its 3 moons. 1+3=4=Quad. Makes sense. Itâs part of a solar system that's part of a massive star cluster known as The J, which itself has tons of inhabited planets and moons. The quad is composed of an intricate caste system that correlates to the limited desirable real estate .