Cockroaches are infamous for their tenacity, and are often cited as the most likely survivors of a nuclear war. Some even claim that they can live without their heads. It turns out that these armchair exterminators (and their professional brethren) are right. Headless roaches are capable of living for weeks.
Which animal has no head? - Quora. Echinoderms. That includes starfish, sea urchins, and sea cucumbers. Also coelenterates, which includes corals, jellyfish, and sea anemones.
Seventy years ago, a farmer beheaded a chicken in Colorado, and it refused to die. Mike, as the bird became known, survived for 18 months and became famous.
Like most birds, chickens have internal reproductive organs. Roosters have internal testicles located at the base of the spine and under the tail. They also have a cloaca which serves as the portal by which sperm exits the rooster's body.
According to the National Chicken Council, chickens are electronically stunned before they are slaughtered, which renders the animals unable to feel pain.
Why the Crab Has No Head.
Leech has 32 brains. A leech's internal structure is segregated into 32 separate segments, and each of these segments has its own brain. Leech is an annelid.
Like cockroaches and squid, the octopus' neurology is controlled by multiple separate brains — nine in the case of this strange octopod. And plenty of their skills of manipulation come down to the fact that they can use those brains to control eight distinct tentacles. But their circulatory system is just as unusual.
Snails: Even though their mouths are no larger than the head of a pin, they can have over 25,000 teeth over a lifetime – which are located on the tongue and continually lost and replaced like a shark!
The animal with the most stomachs is the elephant! They have an average of 800 stomachs which helps them digest their food.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Great white sharks are arguably most famous for their teeth—all 300 of them that come lined in seven rows. Like other shark species, great white sharks shed and regrow teeth throughout their lives.
The animal with eight hearts is Barosaurus.
Having eight hearts means that a lot of pressure is required for blood circulation in the body.
The animal which has 32 brains, 300 teeth and 5 pair of eyes is Leeches.
The hepatopancreas of a crab is also called tomalley, or crab "fat"; in crabs the tomalley is yellow or yellow-green in color.
A longstanding related question: Do they feel pain? Yes, researchers now say. Not only do crabs suffer pain, a new study found, but they retain a memory of it (assuming they aren't already dead on your dinner plate). The scientists say its time for new laws to consider the suffering of all crustaceans.
Are shrimp a type of fish? - Quora. No. Shrimp belong to the huge group known as Arthropods. Within the Arthropods, shrimp belong to the common group that includes crabs, Crustaceans.
Three hearts, to be exact. There is a systemic (main) heart. Two lesser hearts pump blood to the gills where waste is discarded and oxygen is received. They work like the right side of the human heart.
You surely know that humans and giraffes have just one heart, as most animals do—but not all. Octopuses and squids (animals called cephalopods) have three hearts. Two hearts pump blood to the gills to take up oxygen, and the other pumps blood around the body (Figure 1).
The prize for having the most number of eyes might belong to the chiton, a type of marine mollusk that can have up to 1000 eyes! Chitons live mostly on or under rocks. They are found mainly in the shallow water near the coast, but some kinds can be found living in water 5000 feet (1524 meters) deep.
Nigersaurus -- so named because it was discovered in Niger -- had the long neck of a Diplodocus and up to 1,000 teeth in its intricate jaws, Sereno, of the University of Chicago, said on Monday. The bones of the 1,000-toothed "lawnmower" which scythed across west Africa were found first by a French researcher.
Kangaroo rats die when they drink water.
Snails need moisture to survive; so if the weather is not cooperating, they can actually sleep up to three years. It has been reported that depending on geography, snails can shift into hibernation (which occurs in the winter), or estivation (also known as 'summer sleep'), helping to escape warm climates.
Jellyfish are prehistoric creatures that have inhabited oceans around the world for millions of years. Although their gelatinous bodies and graceful movements make them appear to be complex creatures, they are actually quite simple in both form and function. Jellyfish are planktons that have no bones, brain, or heart.
A Tardigrade (AKA water bear) is an animal that could theoretically live for 1,000 years. They can enter a latent state where they cease to physically age. Unfortunately, the Tardigrades that were revived after their 100+ year rest died within a few minutes.