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class of subphylum uniramia - symphylasymphyla is yet other small myriapodous group that includes around 160 described species these are also soil
class of subphylum uniramia - pauropodaa small group of uniramians there are 500 species of pauropoda explained so far the minute organisms computing
class of subphylum uniramia - chilopoda chilopoda have the centipedes the class contains some 2500 species that have been described so far they
subphylum uniramia uniramia the largest subphylum of phylum arthropods includes myriapods and insects due to the unbranched nature of the appendages
class of crustacea - malacostracamalacostraca involves most of the larger forms such as crabs lobsters shrimps etc and constitute the majority of
class of crustacea - cirripediathese crustaceans are completely marine and include the barnacles moa species are free living attached to rock and
class of crustacea - branchiurabranchiura involves only around 130 species of ectoparasitic crustaceans living mostly on the integument and gill
class of crustacea - copepodacopepoda is a huge class of small 1-5mm crustaceans occupying both marine and freshwater environments copepods form the
class pycnogonida of phylum arthropodameasures generally 3-4 mm body chiefly made up of cephalothorax abdomen being very small generally four pairs
class arachnida of phylum arthropodabody divided into cephalothorax and abdomen cephalothorax along with four 4 pairs of legs abdomen segmented or
subphylum trilobitomorphasubphylum trilobitomorpha involves the trilobites all species are extinct and the fossils point out that they were all
characteristic features of phylum arthropoda well-developed muscular system along with striated muscles attached to the exoskeleton and visceral
phylum arthropoda - classification of multicellular animalsearlier you known how the coelom evolved and the body of the coelomates got segmented
class hirudinea - classification of coelomthese are leeches number of body segments of these types of animals is fixed usually there are 34 segments
class polychaeta - classification of coelomthere are mainly marine forms with distinct head having eyes and tentacles segments have lateral
characteristic features of coelom sensory system consisting of eyes photoreceptor cells statocysts taste buds and tactile organs respiration by skin
metamerism oe segmentation in the early coelomates the coelom was not divided into segments the whole body cavity was a single space hence body
classification of multicellular animals - coelom we know earlier that the pseudocoel gave animals specific selective benefits among other things this
defects in human development1 for instance when a pregnant woman drinks alcohol her embryo is exposed to similar concentration of alcohol as is in
flaws in developmen of human the human growth and development in spite of its complexity works perfectly most of the time but while development goes
placenta - human developmentwe had said previous in the unit that in the second week of development a primitive uteroplacental circulation is
extra-embryonic membranes and placenta the extra embryonic membranes like you already know provide nourishment and protection these membranes are
embryonic development the embryonic stage extends from the second week by the 8th week and is charactrised by formation of placenta the development
implantation - pre-embryonic developmentafter entering the uterus and formation of icm the blastocyst starts to embed in the endometrium of the
pre-embryo - human developmentabout thirty hours after fertilization the zygote goes through mitosis giving rise to 2 blastomeres these blastomeres