Respiration in insect - cockroach, Biology

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.
Posted Date: 10/1/2012 8:32:36 AM | Location : United States







Related Discussions:- Respiration in insect - cockroach, Assignment Help, Ask Question on Respiration in insect - cockroach, Get Answer, Expert's Help, Respiration in insect - cockroach Discussions

Write discussion on Respiration in insect - cockroach
Your posts are moderated
Related Questions
How is lymph propelled through the lymphatics? Some of the larger lymphatics are capable to contract, or else the lymph is propelled by body muscles which contract and 'squash'

The Jones family was caught in a fire but escaped. Unfortunately the father and daughter suffered burns. The father had second degree burns on his chest, abdomen, and both arms, an

How do genetic mutations influence biological diversity? Too frequent or too extensive genetic mutations usually are deleterious for individuals and species. These mutations fr

How are bacteria classified according to their need for oxygen? According to their necessity of oxygen bacteria are classified into:- a) Anaerobic (those that survive withou


List various criteria for optimum health and satisfactory health according to implant quality scale The criteria for Optimum health according to Implant quality scale are: -

In cats, curled ears (Cu) results from an allele that is dominant over an allele for normal ears (cu). Black colour results from an independently assorting allele (G) that is domin

Explain brownian movement When you view a sol through an ultra microscope, you will observe that colloidal particles appear to be in a state of rapid and irregular motion calle

Select all that are true or correct regarding a buffer: alternately donating and accepting ions a set of chemicals that work together to resist pH change often a weak acid or base

Assessment   While assessing the patient with rheumatic fever, a detailed history including, problematic environmental factors or recent exposure to streptococcal infection is