state the characteristics of animals of group arthropods. give its for example
Answers
Answer:
Arthro means jointed and poda means legs.. So arthropods means insects those have jointed legs. Example: Julus, butterfly etc.
They are tribloblastic, unisexual insects.
Answer:
⇒Arthropoda is largest group of animals.
⇒They live in all types of habitat air, water and land.
⇒There exoskeleton is made up of chitin, the material found in cell wall of fungi.
⇒They have haemocoel which is reduced coelom and communicates with blood vascular system.
⇒Digestive system is in the form of alimentary canal with two openings mouth and anus.
⇒Excretory system in in form of malphighian tubules and excretory system in solid uric acid.
⇒Nervous system in highly developed composed of simple brain, ganglia and nerve cord.
⇒Sensory organs are usually compound eyes and antenna etc.
⇒Respiratory system in i the form of air tubules called tracheae whch open to outside by means of paired openings called spiracles.
⇒Aquatic arthropds respire through gills and book lungs.
⇒Open blood circulatory system is presented.
⇒Sexes are separate.The testes and ovaries, produce sperms and eggs respectively.
⇒Arthropods shed their exoskeleton periodically and replace it with one of larger size for growth this process is called moulting or ecdysis.
Example:
Mosquitoes, flies, lice, flea, tse-tse fly, silk worm, honey bee, lobster, crabs, prawn, wood louse, dragon fly, butterflies, moths, wasps, beetles, scorpion, spider, mites, ticks, centipedes, millipedes etc.