DISSECTION OF PALAEMON (PRAWN) External features of Palaemon (Prawn) It is fresh-water prawn, which forms a highly palatable dish. Prawn is the most favourite and well-liked animal by the students. Total length : 25 to 35 cm. Shape: Spindle-shaped, elongated and bilaterally symmetrical. Colour: Pale blue or greenish it becomes…
DISSECTION OF POECILOCERUS (GRASSHOPPER) General anatomy of Poecilocerus (Grasshopper) Procedure For Dissection of poecilocerus (Grasshopper) take either preserved or freshly chloroformed grasshopper. Fix it in the dissecting dish. Cut the lateral membranes between terga and sterna. Remove carefully the cut tergal plates over thorax and head region to study the…
DISSECTION OF PERIPLANETA AMERICANA (COCKROACH) This is a common cockroach. This insect is the most suited for laboratory study due to its manageable size, abundant occurrence and being least specialized insect. It is Nocturnal and cursorial, inhabiting drain pipes and backeries. External features of periplaneta americana (Cockroach) Procedure For Dissection…
DISSECTION OF SEPIA (CUTTLE FISH) External features of Sepia (Cuttle Fish) Sepia is commonly found in sea in India. Very favourite class room specimen and very good animal tc study the nervous system. The preserved specimen is brownish in colour bluish with leathery texture. The animal can atonce be recognized…
DISSECTION OF LOLIGO (SQUID) External features For dissection of loligo (Squid)Take a nicely preserved specimen. Loligo (Squid) can be easily differentiated from Sepia by having lateral fin in the posterior region of the trunk. Study various structures in head and trunk regions. Nervous system Procedure Dissect the animal by making…
DISSSECTION OF PILA GLOBOSA (APPLE SNAIL) Pila Globosa is the most common and abundant gastropod, inhabiting ponds, rivers, tanks and rice-fields. It is very familiar for dissection and is also famous for its very slow movement called as snail pace. External features of Pila Globosa (Apple Snail) with shell and…
DISSECTION OF UNIO OR LAMELLIDENS External features of Unio or Lamellidens Unio is the most familiar specimen amongst laboratory dissections. Unio is found abundantly in lime-rich water and in the bottom of lakes, ponds, rivers and streams. Generally they are found half-embedded in mud or sand at the bottom. Procedure…
DISSECTION OF HIRUDINARIA GRANULOSA (LEECH) It is the common cattle leech. For studying external features, take freshly killed specimens with chloroform vapours. External features of Hirudinaria Granulosa (Leech) Number of segments : 33. Number of annuli in a typical middle segment is 5. Total length : 5 to 10 cm.…
DISSECTION OF PHERETIMA POSTHUMA (EARTHWORM) External features of pheretima posthuma (earthworm) It is common earthworm. For external features of pheretima posthuma (earthworm), living narcotised or preserved specimens can be examined. Observe and draw the following parts. Draw separately dorsal and ventral suifaces. Distinguish the dorsal suiface by median blood vessel.…
DISSECTION OF NEREIS (CLAM WORM) General Instructions for Dissection of ascaris (round worm) While dissecting the animal keep in mind the following points. Listen and follow carefully the instructions given by the teacher in your practical class. Study well about the internal structures of the animal to be dissected. Keep…
DISSECTION OF ASCARIS (ROUND WORM) General Instructions for Dissection of ascaris (round worm) While dissecting the animal keep in mind the following points. Listen and follow carefully the instructions given by the teacher in your practical class. Study well about the internal structures of the animal to be dissected. Keep…