"BASIC CONCEPTS"

COXA- RENAL APERTURE-OPENING OF EXCRETORY ORGAN PRESENT. ENDOPODITE- SENSORY FEELERS ARE PRESENT. EXOPODITE- ALSO CALLED SQUAMA. SERVES AS BALANCER DURING SWIMMING. THUS ANTENNA ARE EXCRETORY,SENSORY AND BALANCING IN FUNCTION. COXA-HEAD- Molar processes(5 to 6 dental plates are present). incisor process(3 teeth are present). EXOPODITE IS ABSENT Mandibles are strong calcified(containing calcium salts)due to their masticatory function. They function as biting jaw of prawn. Free borders of  Coxa and basis project inward as jaws. ENDOPODITE- Curved process bifurcated at the apex. EXOPODITE IS ABSENT. Maxillulae help in food manipulation i.e.the ability to control all kinds of food. COXA- It is small. BASIS- It forms bifurcated gnathobase. EXOPODITE- Forms large fan shaped baler containing setae. movement of baler creates water current passing over the gills. THUS MAXILLA HELPS IN RESPIRATION AND FOOD MANIPULA...

           कागज़ को फाड़ने पर आवाज़ क्यों आती है?????????? हम जानते है की कागज़ पेड़ -पौधों से मिलने वाले CELLULOSE FIBRES से मिलकर बने होते है। ये FIBRES एक दूसरे से एक जाली की तरह जुड़े होते है। इनके बीच में HYDROGEN BOND होता है। जब कागज़ को फाड़ा  जाता है तो उसे विपरीत दिशा में खींचा जाता है। इससे कागज़ को जोड़े रखने वाले HYDROGEN BOND टूटने लगते है। ऐसा होने से CELLULOSE FIBRES कंपन(VIBRATE) करने लगते है जिससे आवाज़ पैदा होती है।  लेकिन जब कागज़ गीला हो तो फाड़ने पर  आवाज़ नहीं आती ऐसा क्यों ???????? क्योंकि कागज़ गीला होने पर कागज़ के FIBRES पानी को सोख कर फूल जाते हैऔर आपस में चिपक जाते है। इसलिए कागज़ फाड़ने पर वो कम्पन नहीं कर पाते है। और कम्पन नहीं होने से आवाज़ नहीं आती। 

Have you ever wondered that why doctors and other staff wear green apron in operation theatre??????? REASON- Generally doctors wear white apron during their duty b/z it represents peace,cleanliness so that patient feel calm and pleasant atmosphere. But when they operate a patient,they wear green apron.If they wear white apron ,then blood spots will look more prominent and clear.It would lead to a negative impact. So to avoid this negative situation,we need such a color which can hide blood spots and look pleasant as well. So for this any color can be chosen like red,black,green,etc. Red and black color are not considered auspicious. Green color  suits our eyes and easily hide blood spots. Green color fulfills all the necessary conditions.that's why it is chosen.

       "APPENDAGES OF PRA WN "          Habit and habitat of prawn( Palaemon malcolmsonii)- It lives in freshwater streams,rivers,ponds and lakes.It is nocturnal animal.It is found in central India and Tamil Nadu. Body of prawn-                                                                                        Now we are going to discuss the cephalic appendages of prawn -    Beginning from the anterior end of head the appendages are- Antennules,antennae,mandibles,maxillulae,maxillae Now starting from the Antennules- PRECOXA - Statocyst (organ of equilibrium) opens here . COXA       -Cylindrical in shape. BASIS       -Setae are absen...

              My motive of publishing these posts is - I want to make study easy with  the help of diagrams and flowcharts so that students can easily understand about that topic.

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