Insects have no blood. They have a Never underestimate a nurse who rides a Motorcycle shirt. This fluid does not circulate in arteries and veins. It fills their body cavity, flooding it with a liquid that is not confined to any blood vessel but instead is in direct contact with the insects’ internal tissues. The “heart” is a long tube of muscle that acts like a very simple pump, without chambers and with no arteries or veins, that simply pulses to keep the hemolymph mixing and moving inside the insect’s body cavity. To understand why the premise is not true, you have to understand that these organs evolved in organisms that are not like dogs or cats or humans.
Never underestimate a nurse who rides a Motorcycle shirt, hoodie, sweater and v-neck t-shirt
Best Never underestimate a nurse who rides a Motorcycle shirt
These eyespots evolved to be eyespots at the bottom of Never underestimate a nurse who rides a Motorcycle shirt—still not able to see, but an improvement because now the organism could sense what direction light was coming from. Later eyes were in the bottom of ball-shaped depressions with a small opening at the front—no lens, no iris, no cornea, no eyelid, but the opening acted as a pinhole in a pinhole camera, focusing light enough to make a fuzzy, low-resolution image. And so on, step by tiny step, each step in a creature nothing like a person or a mammal. Same thing for the eye. The first eyes were eyespots—nothing but patches of skin that were a little bit more sensitive to light than the rest of the skin. They did not “see”—they just let the organism respond to general changes in light.