Do beetles have blood

Answer 1

Depends on the species. There is an astronomical number of species of beetle, and the diets of each beetle is almost diverse and seemingly infinitely varying as their physical structure. Some are carnivores, some herbivores, and some omnivores; and some have become eminently specialized in their diet eg. eating only one species of plant.

Answer 2

1. Yes. Insects do have blood -- sort of. It's usually called hemolymph (or haemolymph) and is sharply distinguished from human blood and the blood of most animals that you would be likely to have seen by an absence of red blood cells. In a sense, as you might guess from the name, hemolymph plays a sort of double role, doing the jobs that both blood and the lymphatic system do in humans and other vertebrates.
2. Hemolymph is mostly water, plus various other odds and ends like amino acids, ions, lipids (fats), carbohydrates, etc., as well as some pigments, but these are rarely very strongly colored. Typical colors for hemolymph itself are greenish or yellowish. There are also some cells, called hemocytes, that float around in the hemolymph, but they are part of an insect's immune system.
3. In insects, most of the organs that need oxygen are pretty near the air, and ''breathing" is done by taking in oxygen through lots of little openings to the outside. The oxygen gets to where it's needed mainly by diffusion.
4. This, of course, can also happen via the hemolymph, but it's a pretty passive form of oxygen transport. There are some exceptions to the rule, and some insects do have pigments like hemoglobin -- at least one with copper in place of iron -- to help, but they are few and far between. Even when there is something like hemoglobin, there are no ''red blood cells."
5. Hemolymph also provides a means of lubricating things and getting nutrients to cells and carrying waste away. In case you're wondering: Yes, the little buggers do have hearts (of sorts) to pump the stuff around!
6. As you point out, mosquitoes do indeed have real blood in them after they have fed, but the red when you splat a house fly has a different and arguably more gruesome origin -- that red comes from a pigment in the fly's eyes.

Answer 3

Yes, beetles have blood, but it is not the same as human blood. Insects have an open circulatory system where the blood, called hemolymph, bathes the organs directly instead of flowing through vessels like in humans.

Answer 4

Yes, wasps have blood. Their blood is more similar to lymph in vertebrates, and they do not have blood vessels like vertebrates do.

Answer 5

no they have hemolymph