Suggest why an insect does not need blood vessels to transport its blood around the body?

  • 0 votes

I don't understand why insects doesn't have blood vessels and also i need to know how blood is transported around the insects body...Plz reply me...i need the answers soon...

Posted Wed 2nd May, 2012 @ 20:30 by Isharani Punchihewa

3 Answers

  • 2 votes

It's transported by diffusion - transport of a liquid/gas from a high concetration to a low concentration. So that means that it doesn't need blood vessels because the blood will travel all around the body.

Answered Thu 3rd May, 2012 @ 16:49 by Oliver
  • 2 votes

it's to do with the fact that insects are very very small, most gases needed for respiration can diffuse from the air straight into their cells and muscles via the tracheal system, which is like the blood system, but instead of blood being used to transport oxygen etc, the gases flow through the tube systems alone, kind of like the bronchiole system in our lungs. the tracheoles are smaller brances of the main trachea and they get to every part of the insect and due to the thin membranes oxygen can diffuse straight across them into the cells of the insect. as insects dont really have 'blood' but actual oxygen travelling through their tracheal system, and this is mantained as the respiring cells use up oxygen and this induces a lower concentration gradient at the ends of the tracheoles so its like a continuous supply of oxygen travelling down the concentration gradient at all times. oxygen enters the trachea through tiny pores called spiracles.  this is also the method to which co2 is removed :)

Answered Sat 5th May, 2012 @ 13:12 by Sally Bradley
Edited by Sally Bradley on Sat 5th May, 2012 @ 13:13
  • 0 votes

Thanksss :)

Answered Fri 4th May, 2012 @ 18:37 by Isharani Punchihewa