In this article we will discuss about the nervous system of dogfish with the help of suitable diagrams. Central Nervous System: The central nervous system is essentially tubular and encloses a narrow central canal within the spinal cord which widens out anteriorly to form the ventricles of the brain. 1. Brain: The brain of Scoliodon is large and considerably advances [...]
In this article we will discuss about the external features of dogfish with the help of suitable diagrams. Shape, Size and Colour: Dogfish (Scoliodon) has a long, laterally compressed spindle-shaped body tapering at both ends. The full grown specimen measures from 30 to 60 cm in length. The colour of the body is dark grey above and pale white beneath, [...]
In Dogfish (Scoliodon), the respiration is aquatic, since the animal resides in water. It breathes by means of gills borne in a series of gill-pouches on either lateral side of the pharynx. Water enters the mouth and after passing through the buccal cavity, pharynx, gill- pouches bearing gill-lamallae, goes out through the external gill-slits after bathing the gills. Respiratory Organs: [...]