Respiration in insect - cockroach, Biology

Assignment Help:

RESPIRATION IN INSECT (COCKROACH) -

  • Respiration is direct. So metabolic rate is high.
  • This system is related to each cell of the body so respiratory pigment is absent.
  • Unit of respiratory system is trachea. These are white thread like form net in body.
  • Ectodermal in origin. In wall of trachea taenidia present.
  • These are complete rings made up of cuticle, maintain diameter of trachea.
  • Branches of trachea near organs are tracheoles in their wall rings are absent.
  • Diameter is less. Walls are elastic. Lumen is narrow. Thin cuticle is tracheoline.
  • At the point of origin of tracheoles, tracheole cell present.
  • In the end of tracheoles, tracheole fluid is filled, helpfull in exchange of gases.
  • All trachea are originated from 3 pairs of tracheal trunks D, V & L.
  • Lateral tracheal trunk is thickest one only this opens out side by 10 pairs of spiracles or stigmeta.
  • 2 pairs thoracic spiracles are present. 8 pairs abdominal spiracles are present.
  • 1st pair thoracic spiracle present between prothorax and mesothorax.
  • 2nd pair thoracic spiracle present between meso and metathorax.
  • 8 pairs abdominal spiracle present in first 8 segments of abdomen. Spiracles are ectodermal in origin.
  • All spiracles present on lateral side, except 1st abdominal spiracle or 3rd spiracle.
  • Near to spiracle Peristigmetal gland present. Each spiracle is protected by a plate i.e., peritreme.
  • Cavity of spiracle is atrium. In it bristles present to check dust particles.
  • By the outgrowth of wall of atrium a valve is formed. Controls opening and closing of spiracle.
  • 1st thoracic and 1st abdominal spiracles always remains open, rest open or close during process.

Related Discussions:- Respiration in insect - cockroach

What is the difference among systole and diastole, What is the difference a...

What is the difference among systole and diastole Systole and diastole are the two stages into which the cardiac cycle is separated. Systole is the stage when the contraction o

Explain the term mutations, Explain the term Mutations? Mutations are c...

Explain the term Mutations? Mutations are changes in the genetic structure of an organism that occur at random or are the results of environmental causes. The majority of new m

Nutrient intake during constipation, Q. What about the fluid and other nutr...

Q. What about the fluid and other nutrient intake during constipation? The fluid intake should be at least 2 litres daily. This includes fluid as foods and beverage besides wa

Zoology, give the discriptive account of nerilla which belongs to class a...

give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida

Water pollutants - water pollution, Water Pollutants - Water Pollution ...

Water Pollutants - Water Pollution Water pollution can occur on account of any one or more of the following agents: 1. Biological: Pathogens such as virus, bacteria,

Classification of viruses, Classification of Viruses No evolutionary or...

Classification of Viruses No evolutionary or phylogenetic exist between viruses. A   nature system of classification cannot, therefore, be devised for viruses. Holmes (1948)

Peak flow velocity, Peak Flow Velocity  fs  derived  from Doppler  shift by...

Peak Flow Velocity  fs  derived  from Doppler  shift by  rearranging Doppler equation: V = C/2 x ΔF/Fo Various  information can be obtained from spectral display

Spinal nerves, Spinal nerves: They take their origin from the spinal...

Spinal nerves: They take their origin from the spinal cord. They are the mixed nerves having both sensory and motor fibres. There are 31 pairs of spinal nerves. The se

Role of fat or lipids in metabolism, ROLE OF FAT OR LIPIDS - Made up...

ROLE OF FAT OR LIPIDS - Made up of fatty acids & glycerol. Linked by ester bond. Maximum quantity of energy is librated. Helpful in temperature regulation. As stored f

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd