Generally the food travels by muscular movements of the alimentary canal.In bats can they afford to have muscular movements to push food against gravitational pulltoo?
208548
Peristalsis.  The sequential contractions of muscles along the canal.
469629
bats still use their eyes to see!! They use echolocation to find the precise location of prey...but they use eyes as well.  It may be albe to know where a bug is by the echolocation and then fly to that spot to get it...but would still need to see with it's eyes to grab it.  Bats are not constantly sending out signals...they use their eyes to see the rest of the time.  They send out the signals when they want to feed.  So, if you blindfolded a bat, it would crash into something, and most likely die.
201249
The proventriculus is a glandular part of the stomach that stores and starts to digest food before it enters the gizzard.
202270
There is a muscluar layer separating the abdomen and thorax (chest cavity) called the diaphragm.  by cotracting and flattening this increases the volume of the thorax.\n\nthis movement is part of normal breathing.\n\nthe nerve which controls this movement (the phrenic nerve)  runns over the heart.\n\nunder certain circumstances esp when breathing is interupted by vountary behaviour such as repeated swallowing (for example when eating quickly) the diaphragm can go into preiods of repeated spasm,  mediated by rhythmic stimulation of the phrenic nerve.\n\nthis is experienced as a hicup by the individual\n\nmeasures to stop hicups,  such as being scared,  holding breath, or drinking from the wrong side of a cup, are all ways of trying to deliberatly hold te diaphragm in a state of relaxation to allow normal control to resume
213500
Crabs run or move sideways because that is the way their legs bend. Crabs do not have ball-and-socket joints; many crabs have joints in their legs moving in a restricted number of planes so that they can only move sideways. Many crabs like the "Shore Crab" need to scamper sideways to avoid the legs getting tangled up with each other. \n\nMuscles work in pairs. A muscle can only retract, or pull; to lengthen again it must relax and be pulled back by another 'antagonistic' muscle. The muscle blocks in crabs are attached to the inner surface of the exoskeleton, including the ten tubular legs, including the legs with claws, or chelae, as well as other appendages.\nAslo,For animals, their body lengths are normally larger than the widths. For locomotion, animals usually move along the long axis of their bodies. As crabs run sideways, they are moving along the long axis of their bodies.
465891
Worms don't really have much in the way of a brain or nervous system, so I doubt they mind.  As far as other animals, I used to be against it but I've become rather desensitized to it... Many more animals are killed to become food or fur, or killed for sport... I have to deal with killing mice on a regular basis to feed snakes... They are low on the food chain for a reason.  A few humanely euthanized rats here and there for students to learn is a small price to pay.  As a bio student, there really is no replacement for learning first hand on the real thing.  My favorite dissection was a fetal pig in high school... Very interesting.  The only time I took offense was a mink dissection, and that is because the school was actually getting the minks from fur farms and paying for them, so our experiments were fueling the fur trade...
612549
Well, its true for some and false for others...\n\nBaleen: few inches across -> feed on small creatures\n\nSperm Whales : boy, these guys have huge throats and can swallow their prey whole.\n\n\nHowever, they can and do expand their throats.
566253
They use suction cups on their legs to crawl and the muscles in their bodies help them pull themselves along. So it may look a little funny to you but to them it is a daily must! I hope I answered your question!
238649
gravity shows them to move and rotate. the hubble space telescope has pics that show it in time lapse of course.
633385
The simple answer is, of course, different anatomical adaptations. Since water helps support the whales mass, their skeletons are relatively light compared to a land animal's. The dinosaurs had made many adaptations to their weight -- just as elephants, hippos and rhinos have.\n\nThat said, a small fall for a creature of large mass is likely to do internal damage in a way that never happens for small animals.
202423
Birds don't blow up when you feed them bicarbonate of soda.  They also don't blow up if you feed them uncooked rice.\n\nExcess gas build-up in the gastrointestinal system is not a lethal situation for birds.  They may not release the gas in one single belch as many mammals do, but they are certainly capable of slowly exuding the gases as they build up.\n\nOne thing that might prevent loud/sudden erectations is the bird system of a crop and gizzard before the main stomach.  There are a couple of potential chambers that could act to slow the release or trap bubbles of gas for longer.
187490
It's not so much that a bat has to hang upside down, some bats, such as the famous vampire bat, are quite good at moving around on the ground using their feet and wings as locomotory limbs.\n\nMost bats have developed adaptations that allow them to hang upside down easily.  The tendons and ligaments in their feet are arranged in such a way that their natural position is 'flexed'.  It actually takes deliberate effort for them to let go with their feet.  So when they wrap their toes around a branch, or hook their claws on a crack or crevice in the rock, they can rest and even sleep without fear of falling off.  Their feet are locked in place.\n\nMost bats have their feet pretty much turned around, so that if they were lying down, the soles of their feet would point up.  This makes roosting and even catching flying prey easier, but makes walking somewhat ackward.  While they can do it if they really need to, they usually don't.  Sort of like a human crawling on their hands and knees.  We can do it, but it's not really what our limbs are adapted to do.
28239
Yes, through body movement, sounds, biting, ect..
246262
Ants find their way to food in two different ways. Sometimes a scout simply bumps into a food source. Usually though Ants use their incredibly powerful antenna to detect particles in the air, just like a snakes tongue does. Its very much like smelling. They communicate to the other ants their is food by first laying a trail from the food source back to the nest. They do this almost always in the straightest fashion as possible, even if they have been weaving around for hours. Once back at the nest they convey chemical signals, which gets all the other worker ants (who are all female) to follow her chemical trail to the food. The combine brain power of a colony of ants is equal to a single human. And although no one ant is telling them what to do, each ant knows its job.
261227
In order to withstand pressure, their cells must counterbalance the extreme pressure outside. Also, animals at such depths are generally colourless and are blind. They navigate by sound.
423040
the mink...  it is likely due to the fact that they have short, active lifespans... they need a constant, high energy diet but can not eat too much in one sitting..  during evolution, it's likely that there was little to no energy invested in development of the digestive tract because of its short lifespan...\n\nalso, being a carnivore, they have no need for a cecum and long digestive tract (like rabbits, sheep, and deer) which is useful in extracting the low amounts of energy from plant material...
428099
Probably by using their quickness in trees to get away from predators. They, at 2.5 kg, are not going to be formidable fighters.\n\nPS Ron is giving you a localized Madagascar myth as fact. There is no truth to that story, as is presented in his site.\n\nPPS Just found out a little bit about fossas, the lemur eating predator of Madagascar. Looks a bit like an overgrown lemur, itself. Quite well within the evolutionary range of such predators, rising from the basic lemur stock.