dorsal
Caudal fin, Dorsal fin, Pectoral fin, Ventral fin, and the fin.
Motor impulses? Those occur in engines. If you are talking about the spinal cord then you mean motojoto impulses. They enter through the ventral roots. First theories on motojoto impuses were by Akari Motojoto, a Japanese scientist.
The nerve cord of an earthworm is ventral because the nerve cord runs down the ventral, or belly, plane of the organism compared to a dorsal nerve cord, which would run down the dorsal, or back, plane of the organism.
The first changes are the dorsal and mouth turning white. Im at that stage with mine and I am currently trying to find the next stage
The worm is first both male and female the worm is in kingdom Animalia. The worm if you look at on and turn it over on its ventral side (bottom) you will see not to far away from the anterior side which is closet to the mouth the clitellum, it looks little lighter than the rest of the worm and it is not very long. the clitellum is a barrel shaped swelling that starts at the thirty second segment on the worm. this structures aids in the reproduction. Also it can tell us what side is the head and the tail. Talking about the head and the tail there are two different names for the head and the tail end of the worm, the head is called the anterior end and the tail is the posterior end of the tail. Now the first part of the worm is the mouth, the mouth sucks in dirt and then goes to the pharynx ,then through esophagus then trough the crop and then the gizzard and then the intestine then through the rest of the body. worms have two blood vessels dorsal and ventral blood vessel. the dorsal is top and ventral is bottom of the worm. The aortic arches help regulate the blood flow to the dorsal and ventral blood vessels. The nervous system, the worm has a ventral nerve chord running on the ventral side of its body. Telling it what type of surface its on. The worm can tell hot from cold that's why the stay in the dirt to keep cool, that's why is you ever saw a worm dried out on the side walk its because it needs the cool dirt to keep it cool. those are alot of the parts of the worn hope you learned alot from this.
Ventral Arches
I would say the person with the thoracic tumor. The chest is smaller than the abdomen region. This will cause the problems with breathing since the tumor could grow blocking the lungs.
nasal cavity
it depends how deep is your cavity .if the cavity is under your gum there are few chance to keep it because to do a root canal or put a crown is necessary remove all cavity and is contraindicated if your cavity is under your gum or close to the root. If the cavity is too big, sometimes there is nothing that can be done and the tooth has to be extracted. But a first molar is a big tooth that is important for chewing. If you lose it, it will affect the other teeth. Therefore if there is anyway to repair the cavity, by either a filling or a root canal, it would be the best option.
I dont know but the first episode of victorious trina said she never had 1 cavity so i think she doesnt but i dont know everyone has to have a cavity once in there life :)
nasal cavity
dorsal root ganglia and cranial root ganglia