The Housefly Part 2

[answerbok]

And when you think about it.. a fly has a digestive system, lungs of some sort, presumably, a heart; How big must a fly's heart be? and realising that, how about the size of it's arteries? the size of the one way valves in it's veins.. how big a wing muscle for all that wingwork.. But mostly those neural pathways to operate it all; how tiny are it's synapses? 'scuse, i got a bee in my bonnet about this now.. Comments anyone?

[j2buttonsw]

I thought insects didn't have lungs/hearts/circulatory system: they have an exoskeleton and oxygen diffuses through millions of pores. That said, why is there blood when you splat them?

[drochit]

Interesting bit about a fly's wings.
Flies can flap their wings with an incredible speed of about 200 times per second. No muscle can perform so many movements but the fly uses a very clever system where the thorax moves the wings up and down. This is more energy efficient and enables the fly to use not every muscle at the same time. The muscles work in shifts, one after another.