DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF HEXAPODA and MYRIAPODA

DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF HEXAPODA AND MYRIAPODA

TERMS OBJECTIVES
Insect The arthropods with three Fairs of wing. one pair of antennae
Thermoregulation Thermoregulation is the ability to maintain body temperatures at a level different from environmental temperatures.
Direct or Synchorous flight The mechanism of flight in which muscles moves both wing directly at the same time.
Indirect or Asynchorous flight The mechanism of flight in which muscles moves both wing indirectly at different times.
Labrum Labrum is an upper. lip like structure. It is sensory in function.
Mandible Mandibles are sclerotized chewing (ut.) mouthparts.
Maxillae The maxillae have cutting surfaces. They bear a sensory palp.
Labium The labium is a sensory lower lip.
Trachea Trachea is highly branched systems of chitin-lined tubes.
Passive suction The drawing of air inside due to concentration difference of


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gases between the spiracle and tracheae   is called passive
suction.

Basking The absorption of heat energy of sun by sitting under sun is called basking.
Ectotherms The animals which use external heat source to raise their body temperature are called ectotherms.
Heterotherms The animals which relay on both external heat and internal. metabolic heat are called heterotherms.
Shivering Thermogenesis Insects can generate heat by rapid contraction of muscles. This process is called shivering thermogenesis.
Mechanoreceptors Mechanoreceptors detect physical displacement of the body or of body parts.
Compound Eyes Compound eye consists of an up to 28.000 receptors. These receptors are called ommatidia. The ommatidia are fused into a multifaceted eye.
Ommatidia The receptor of compound eye is called ommatidia.
Ocelli Ocelli are sensitive to changes in light intensity. Therefore. they are involved in the regulation of daily rhythms.
Pheromones The chemicals released by an animal that change the behavior or physiology of another member of the same species is called pheromones.
Sperm receptacle Sperm receptacle is an out pocket of the female reproductive tract.
Instar Theimmature stages of insects similar to adult are called larval instars.
Ametabolous metamorphosis In this case, primary differences between adults and larvae are body size and sexual maturity.
Paurometabolous metamorphosis In this case, larvae undergo number of molts between egg and adult stages.
Nymph Immature larva is called nymphs.
Holometabolous metamorphosis In this case, immature is different from the adult in body form.
Larva The immatures of an insect which differ from the adult, are called larvae.
Pupa The last larval molt forms an inactive structure called papa.
Emergence or eclosion The    final    molt     occurs    within    the   cocoon,     chrysalis,      or puperium. The adult open the cocoon with its mandibles and come out. This final process is called emergence or eclosion
Drones Reproductive males are called kings or drones.
Caste Each kind of individual in an insect colony is called a caste.
Queen Reproductive females are called queens.
Convergent evolution Polyphyletic evolution in which different organism show similar characteristics.

 

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