cockroach has only  white blood then where it gets the oxygen?
347004
cockroach respires with the help of air tubes called trachae which is spread all over the body.Trachae opens to the exterior by means of 10 pairs of stigmata or spiracles which have valves.Air enters stigmata and is directly taken into the tissues where exchange of gases takes place.Blood has no role to play in respiration as in other animals and so respiration in cockroach(in insects in general) is said to be direct and more efficient than in any other animal.
36742
A giant mantis has two reasons not to survive.\n\nTo sum the consequenses up, a giant prayer mantis has difficulty taking in oxygen; cannot fly; and will collapse.\n\nThe first, the oxygen thing. Just as the previous answer indicates, insects intake oxygen via diffusion.\n\nPicture a room with perfect still air, like a cellar. Suppose you put an open bottle of perfume at one end of the room. Some time later, you can smell the perfume at the other end of the room. There's no air current in the room to bring the fragrant to you. It's the perfume molecules, they wander around randomly. Some of them find their way into your nostrils so you can smell them. You will be able to smell the perfume sooner in a smaller room because the molecules have to wander through a shorter distance.\n\nThe blood of insects does not carry oxygen, they have a series of air-filled tubes (called trachea, plural tracheae) all over their body, opening to some 'port-holes' (called spiracles) along their abdomen. Most of insects are so small that the oxygen molecules, once entered the spiracles (port-holes), don't have long to wander along the tubes before reaching their destination -- the organs where they are consumed. Now, suppose the same insect is enlarged 80 times its length. The airway is also enlonged 80 times. It would take a LOT more time for oxygen to wander along this super long tube. During that time, the organs would have consumed all the oxygen around them without new oxygen coming in. So they die, and the insect dying with them.\n\nHowever this is only the case for small insects. Larger insects actually have air-bags withing their body to make a breeze along their tracheae (air tubes) to bring in oxygen. Quoting from the sourse page, "Larger insects, such as grasshoppers and wasps, have internal air sacs connected to their tracheae. These insects speed up their gas exchange by squeezing the sacs to make them suck air in from outside." I've no idea whether a prayer mantis has air sacs or not, but I've seen one bigger than any grasshoppers or wasps I ever saw. Nevertheless, a giant prayer mantis would need much more powerful air sacs than the grasshoppers'.\n\nNow come to the second reason. Size. We will look at the two consequences of a super-huge size seperately.\n\nThink of a car on a highway. It can drive over 100 feet in a matter of seconds -- let's say 2 seconds, so it's speed is 50 feet per second. Now the car shrinks to the size of a prayer mantis. In the same 2 seconds, how far can it drive now? 1 feet, more or less, so it's speed is 0.5 feet per second. We see that the mini car is much slower. But the driver, who shrank with the car, he thinks he's driving as fast! Now think of the mantis, and think of a helicopter. The mantis flies much slower than the helicopter, just like the mini car is slower than the real car. And we have it that the faster things move through the air, the more resistance they experience. The helicopter flies fast, so its shape must be streamlined, as to reduce air resistance. The prayer mantis flies slow, so he doesn't care much about air resistance, he can have any cool shape he desires. But for a giant mantis? He would move much faster, and experience so much air resistance that with his cool shape (not much streamlined) he won't be able to fly at all.\n\nLet's face the second consequence. Has anyone ever made a jelly block 5 feet long, 5 feet wide and 5 feet high? What will happen if such a giant jelly is constructed? It would collapse right away and flow like water. But any half-inch long, half-inch wide, half-inch high jelly block would stay all right in one's spoon. What happens when the jelly grows in size? For each bit of jelly in the bottom, there's simply much more jelly on top of it! And when that bit of jelly can no longer bear the burden, it breaks itself and flow away so that it won't have to support any more. So th
988102
The cockroaches you see dead around the house are found on their backs because they have been poisoned. The poison causes their muscles to spasm, and that in turn causes them to flip over. Normally a cockroach that has flipped over can right itself, but the posion prevents muscle co-ordination and stops them from righting themselves. So when they die they are found on their backs.\n\nIn contrast cockroaches found dead in the garden are just as often found dead in standing positions or lying on their sides.
225986
I'm going with B on this one.  The pulmonay arteries are taking deoxygenated blood away from the heart to the lungs to pick up O2 and drop off CO2.  This would mean that this blood is as full of CO2 as it can be in the body - at least in healthy people.\n\nC, the pulmonary arteries have just dropped off their CO2, so they don't have much. Not it.\n\nD, I think if the PCO2 were higher here than in the blood, then CO2 would diffuse out of the lungs and into the blood. Not it.\n\nE, The CO2 from the interstitial fluid is always diffusing into the veinous blood.  It's kept at a fairly constant rate, so that's probably not it.\n\nA, this could be the answer.  Honestly I don't know the PCO2 of the atmospheric air, but it would make sense to me that it's lower than what's in the pulmonary arteries because, again, CO2 that you breathed in would diffuse INTO the blood instead of out of it.
1046568
No, cockroaches have exoskeleton - meaning that the bones of theirs are on the outside.
811077
Cockroaches.  They can withstand nuclear radiation.
269404
cockroaches and polar bears...  ;)
1039404
Lack of oxygen in your system!
1118551
There are several vertebrates with blood that is green in color as a result of a buildup of the breakdown products of hemoglobin. This is a natural state for these species.
873471
A quick question with a quick answer: They're not blind.\n\nBut if you're still curious if they use it to navigate around... No.\n\nThey use their hypersensitive antennae to navigate, distiguish objects, detect vibrations and find their food.\n\nA cockroach with its antennae cut off will die of starvation.\n\nI do this ALLLLLLLLLLL THE TIME!!!!\n\nAND ITS FEEEEEEEEELLS SO GOOOOOOOOD!!!\n\nYucky creepy bastards!
229402
jellyfish 'breathe' by simple diffusion of oxygen from the water around them.  they don't have much of a metabolism, so don't require huge amounts of oxygen.\n\ncrabs and prawns are both crustaceans, and breathe through series of leaf-shaped gills under their abdomen called phyllopods.\n\nsea stars i can't recall for sure, but i think they also breathe primarily through diffusion between their skin and the water (again, not terribly active, so low metabolic needs).\n\noctopus breathe through large feathery gills inside their mantle.  each gill has its own associated heart to help spread the oxygenated blood around the body.\n\nsea snakes have lungs just like you or I do (although one lung is usually very tiny or even totally missing) and need to breathe air.  they swim to the surface every so often to take a breath before diving back under the sea.
895811
cockrobin\n\n"WHAT'S THAT UP MY @RSE BATMAN"
414007
Yes, hot (preferably boiling) water would indeed kill cockroaches, assuming you could keep them in the water for the several seconds it would take to kill them.\n\nCockroaches, like most insects, have a waxy coating or cuticle on their exoskeleton that aids them in regulating water loss from their bodies.  Because of this, most insects have at least some ability to swim, and cockroaches are no exception.\n\nAssuming you had a captive cockroach and a pot of boiling water, what would probably happen is you would drop the cockroach in the pot, and the cockroach would immediately swim for the edge of the pot, climb out and run away before the boiling water killed it.\n\nShould you be able to contain the cockroach and keep it from getting out, it would indeed die.\n\nWe often use boiling water to kill insects before identification, because the boiling water kills them very quickly, but without deforming or discolouring the insect.
148170
i don't think that any protozoan does because they are single celled organisms; gills require diffusion of oxygen across a membrane directly to the blood. protozoans don't have blood. because just about all protozoans are aquatic, they have some kind of system to get oxygen into their cells, but not gill-like.
61373
There is a green respiratory pigments called chlorocruorin, which is green in dilute concentrations, and red in high concentrations. \nHowever, this pigment occurs mostly in annelids (earthworms and their relatives). \nThe greenish fluids in "bugs" (I'm assuming you mean arthropods)could come from defense glands or similar structures, or it could be their gut content in case they were crushed.\nThey have other respiratory pigments, and most are red-violet-bluish in color. Insects don't have pigments.
586396
(m)\n\nLimulus is a true "blue blood" for, while human blood is red, the blood of this creature is a light blue.  Human blood is red because it has a red pigment called hemoglobin which contains iron.  The Limulus blood contains copper rather than hemoglobin thus giving the blood its blue color.  The animal's blood also contains fantastically sensitive chemicals used by researchers in discovering harmful bacteria called endotoxins, sometimes found in human blood.  In short, the blood of this ancient animal might well save your life some day.
412395
cockroaches have exoskeletons