Phylum Arthropoda
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Beneficial Effects Of Arthropods In terms of Pollination In terms of feeding In terms of material production In terms of decomposition In terms of research
Pollination of flowers They serve as food Some produce useful materials like silk E.g Bees They serve as scavengers and thus, help in decomposition Some are important for research E.g Housefly & Fruit fly(Drosophila Melanogaster)
Economic Importance Of Arthropods In terms of pest control In terms of aesthetics In terms of economic purposes In terms of soil formation
They serve as biological control against pests Some are used for aesthetic purposes Some produce honey which is of great economic purposes The faeces of arthropods are the basis for the formation of soil aggregates and humus
Detrimental Effects In terms of parasitism In terms of diseases In terms of destruction In terms of nuisance
Some are parasitic, harming host Some are vector of diseases Some destroy wooden structures, crops and stored food Some arthropods often constitute nuisance and cause painful bites to man
Classification Of Arthropods Sub phylum Sub-phylum Classes Subphylum Classes
Sub phylum: Onychophora Sub-phylum: Chelicerata Classes: Mereostomata, Pycnogonida, Arachnida Subphylum: Mandibulata Classes: Crustacea, Myriapoda (Diplopoda, Chilopoda), Insecta, Parapoda
Characteristics Of Arthropods In terms of group success In terms of appendages In terms of germ layers & symmetry In terms of coelom In terms of segmentation In terms of type of exoskeleton
They are the most successful group of animals There is a presence of jointed appendages (modified for walking, feeding, defense, copulation and sensory reception) They are triploblastic and bilaterally symmetrical They are coelomates There is the presence of segmentation; however, the segmentation is more advanced than that found in annelids. They possess chitinous exoskeleton(cuticle) and haemocoel
Characteristics Of Arthropods In terms of exoskeleton permeability In terms of growth In terms of circulatory system In terms of sexes In terms of development Examples
Their exoskeleton is relatively impermeable to water They grow by moulting/ecydysis for a new exoskeleton to be secreted They possess an open circulatory system containing hemolymph Their sexes are separate Their development is either through complete or incomplete metamorphosis E.g: Crabs, Crayfish, Spiders, Ticks, Millipedes and Insects, etc.
Phylum Arthropoda The … phylum of animals with approximately ….. described species They are the most successful phylum based on …., …. and …..
The largest phylum of animals with approximately 1 million described species They are the most successful phylum based on species, distribution and numbers of individuals