 । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । । ।  वहुए व होगी तोसे थिब आर्दप्याड़ of the orientations of spindle fibers वहागी ठुदुस स्वछने।, उत्कर काइ आप आप एक। the orientation of the spindle fibers of the spindle fibers of the cell being is either here or there. अगर शेथ ठुँप अप रहागे या ये थिछादे शादेगन जा नहीं जोगा एद. So if the spindle fibers are slightly tilted the cell being is a bit tilted form. स्ट्रेउंगे लेग़ल्रा guys , स्द्रेउंगे पू Glück , स्ट्रेउंगे लेग़ल्र चाच्ट्र्लाद्र्या। वत्स्सेंसिस्ता वीवril , दोई किलीविच के लिए चाच्ट्राद्र हमे लेग. अगार आम्मांट अ� rec वोत काम है तो होो बलाटिक अग which have very little amount of yoke and moderate amount of yoke which have very little amount of yoke like these are the akarnoderms the akarnoderms have very little amount of yoke like these are mammals mammals have very little amount of yoke so when they have cell devion, zygote when they divide, then completely 1-2 cells will be formed but some cells have more amount of yoke but some cells divide like amphibians amphibians have very little amount of yoke but these have very little amount of yoke as you can see this is the upper row which have very little amount of yoke as you can see number 2 position 1 cell is completely divided into 2 cells then 2-4 then 4-8 cells so you can see that cells are completely divided so this is the hollow plastic cleavage hollow means completely divided second diagram is about the mesolacital eggs those eggs which have moderate amount of yoke which have amphibians in this you can see that cell devion mesolacital eggs also have complete cell devion although the lower end of cell devion is a little slow but still what cells are doing they are dividing into 2 cells the big size means that there is more amount of yoke so isolacital and mesolacital both the types of eggs they show hollow plastic cleavage miroblastic cleavage miroblastic cleavage is a type of cleavage in which the egg is now completely divided into 2 doctor cells so when cell devion is there then completely one cell will not be divided i.e. embryonic development in zygote so when there is devion then zygote will be divided where there is more yoke so this cleavage is a miroblastic cleavage so miroblastic cleavage they are due to large amount of yoke large amount of yoke is like this and we have examples of this the cleavage in the embryo the cleavage in the zygote of reptile and the birds here you can see in this diagram this is the egg on second stage we can see the cell devion but the cell devion is only at the top there is no cell devion from here because there is a large amount of yoke here after that the further cell devion is on one side the rest of the area there are no cell devions such type of cell devion in which the cell will not be divided but the cell devion will be concentrated in one area called miroblastic cleavage spiral cleavage this is the cleavage in which when the cell divides the cells make different rows tires if the lower cells are not at the top then this is called spiral cleavage the cells are tilted not at the top this example we have protostromes in protostromes there is spiral cleavage radial cleavage the spiral cleavage is a little opposite in the radial cleavage the tires of the cells the lower cells are exactly at the top so the lower rows are exactly at the top one cell is exactly at the top so this is called radial cleavage these two patterns are due to orientation of the spiral fibers in the diagram you can see at the top we can see radial cleavage focus from here if you look at it from the other side lower cells lower cells are exactly at the top upper cell of the lower cell is exactly at the top here also the upper cell is exactly at the top if you look at the lower cell if you look at the lower cell the upper cell is tilted and its position is not at the top so in this type of cleavage the lower cell and the upper cell is not at the same line radial spiral cleavage if we look at it उपर तवामिस को रेडिल ख्लीवेज का नाम देंगे रेडिल ख्लीवेज आमत्र पर दीट्टार स्वोंस के अंद्ती है जब के स्पारे ख्लीवेज प्रोटो स्वोंस का करक्तर स्थ है