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Question
Give an account on phylum Arthropoda.
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Solution
- Arthropoda is the largest phylum.
- The organisms have jointed legs.
- The body is segmented into head, thorax and abdomen.
- The exoskeleton is made up of chitin.
- The coelomic cavity is filled with haemolymph (blood).
- They do not have defined blood vessels. This is called open circulatory system.
- The insects shed the exoskeleton and this process is called moulting.
- Small Arthropods absorb oxygen through the body and larger aquatic species breathe through book gills.
- Land Arthropods breathe through a system of tiny body tubes called tracheae.
- Excretion occurs through malphigian tubules and through green glands in crabs and prawns. .
- Insects, spiders, crabs, shrimps, butterflies, millipedes, centipedes, and scorpions are some arthropods.
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One of the representatives of phylum Arthropoda is
Excretory organs of arthropods are ______.
Give an example of the following:
An oviparous mammal
Differentiate between oviparous and viviparous characteristic
Give a scientific reason.
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Identify my class/phylum and give one example of it:
We form the highest number of animals on the planet. We have bilateral symmetry and our exoskeleton is in the form of chitin.
Which of the following animal is matched with the wrong excretory organ?
