Fish tongues however do not resemble the muscular tongues of humans. The tongue of a fish is formed from a fold in the floor of the mouth. In some species of bony fishes the tongue has teeth which help to hold prey items. The name of one genus of argentinid fish, Glossanodon, literally means 'tongue teeth'.
Overall, sharks do have tongues, but they are not like the tongues of humans or other mammals. Sharks use their tongues mainly for feeding and swallowing, and they do not use them for taste in the same way that mammals do.
Taste sensations
Other animals naturally have no tongues, such as sea stars, sea urchins and other echinoderms, as well as crustaceans, says Chris Mah via email. Mah is a marine invertebrate zoologist at the Smithsonian National Museum of Natural History and has discovered numerous species of sea stars.
With fish, the tongue's function is to transport the food quickly into and through the mouth, where, in many species, an extra set (or sets) of jaws will grind the food.
Another unique anatomical feature are a spider's pedipalps. There are two of these appendages positioned just outside the fangs. They are sensory devices, perhaps like our tongue or the antennae of insects.
A female spider has an organ called an epigyne, which is an external groove on its underside - sort of a bit like a vulva. The epigyne leads to the spermatheca, a pair of organs which store sperm.
"One of the conditions for social animals is that they have a bigger brain size," Mikheyev says. "Not only do they need to store information about the physical environment, but also the social one." Arthropods - invertebrate animals that include spiders, insects and butterflies - don't have brains like humans.
Fish have gills that allow them to “breathe” oxygen dissolved in the water. Water enters the mouth, passes over the gills, and exits the body through a special opening. This keeps an adequate amount of water in their bodies and they don't feel thirsty.
Fish have blood and it is red in color. fish have a red pigment called hemoglobin that is responsible for the red color. Similar to humans, fish have a circulatory system with blood and a heart that acts as a pump. A fish's whole body weight is around 10% of its blood.
Answer and Explanation: Dolphins are the animal that has the poorest sense of smell. This is because dolphins have no sense of smell at all since they lack the nerves that take smell information from the nose to the brain.
Family Channichthyidae has fishes that do not contain hemoglobin pigment in their blood. Hence their blood is white. As Hemoglobin is important for carrying oxygen in the body, but in the habitat of these fishes, the amount of oxygen present in cold water makes them devoid of Hemoglobin.
And there is even a lizard-like animal in New Zealand that naturally has three eyes. This three-eyed animal is called a tuatara. The third eye of a tuatara, located on the top of its head, has all of the right parts: a lens, a retina, and nerves leading to the brain.
Chickens belong to the galliform family, which also includes quail, turkeys, and pheasants. All of these birds have tongues that are structured similarly, and very different than tongues you're used to seeing.
For example, sharks have two penises, sort of. Known as claspers, these two reproductive organs are only on male sharks and they act as the channel for the semen to enter the female's cloaca during mating. The clasper essentially latches on to the female to facilitate reproduction.
Sharks do not rely on two sets of teeth – they have an endless supply of teeth, with a dentition that regenerates constantly throughout life. In some sharks, a new set of teeth develops every two weeks!
Filmed in HD for first time, bat species has longest tongue of any mammal. First discovered in Ecuador in 2005, the tube-lipped nectar bat (Anoura fistulata) has the longest tongue, relative to body length, of any known mammal.
Birds don't have fleshy tongues like ours, but they do have tongues. Different birds have different types of tongues. Birds that drink nectar have tongues shaped like tubes for efficient extraction of liquids.
Some species have hinges on either the carapace or the plastron, which allow closure of the shell. The snapping turtle (Macroclemys sp.) has a worm-like, fleshy structure on its tongue, which it wiggles to attract fish. Turtles cannot protrude their tongues from their mouths, but they can smell.
While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.
Yes, fish experience both physical and emotional pain. Scientists say that it's likely a different type than what humans experience, but it's pain nonetheless. Fish have nerve cell endings called nociceptors, which alert their bodies to potential harm such as high temperatures, intense pressure, and harmful chemicals.
The systemic heart of fishes consists of four chambers in series, the sinus venosus, atrium, ventricle, and conus or bulbus. Valves between the chambers and contraction of all chambers except the bulbus maintain a unidirectional blood flow through the heart.
Yes, ants have brains – albeit very small ones. An ant's brain has 250,000 neurons. Human brains, by comparison, have more than 100 billion brain cells. Despite the relative smallness of an ant's brain in comparison to humans, scientists consider the ant to have the largest brain of all insects.
They Can't See Very Well
Daddy longlegs have simple eyes mounted on eye turrets attached to their bodies. These eyes act as light sensors and do not appear to provide more than blurry images. Research shows that cave harvestmen are most receptive to the light emitted by the glowworms that make up their diet.
However, they did not engage in that sort of behavior with non-predator objects. Now, some people have taken this study to mean that spiders feel fear, an emotion. However, stopping and assessing a potential threat and then running away is not the same as fear. It's a reaction wired into their nervous system.