Animal science knowledge, a little less, hurry,

There are about 1.5 million known animal species. It can be divided into invertebrates and vertebrates.

1.Invertebrates include: protozoa, flattened animals, coelenterates, echinoderms, arthropods, molluscs, annelids, and nematozoa. So invertebrates make up more than 90 percent of all animals in the world.

2.Vertebrates include five species: fish, amphibians, reptiles, birds, and mammals.

Aggressive behavior. Aggression in animals refers to attacks or fights between individuals of the same species. In the animal kingdom, individuals of the same species often attack or fight with each other due to competition for food, mates, and seizure of nesting areas and fields.

Defensive behavior. Defensive behavior of animals is the behavior of animals in order to respond to external aggression, to defend their own survival, or to warn other individuals in their group.

What kind of animal science knowledge do you need?

<> "Animal Fun Science Tips.

1.The crocodile is unable to stick out its tongue, and because the crocodile's palate is too long, their tongue cannot be extended.

2.Giraffes can't cough because they have a special vocal cord. There is a shallow groove in the middle of its vocal cords, which is not very vocalized; In addition, the lungs, thoracic cavity and diaphragm are used to make vocalizations, but because the giraffe's neck is too long and the distance between these organs is too far, it is difficult to scream.

3.Snakes don't blink because their heads don't have muscles that make their eyes move, and snakes don't have eyelids that stretch up and down like humans.

4.The turtle has no teeth at all. Instead, they have pointed beaks, such as birds, and sturdy ridges that mimic teeth.

5.Cows do not have front teeth.

6.The surface of the cat's tongue is covered with tiny papillae, making it feel like sandpaper when touched.

7.Lizard, its tongue is blue.

8.Geese have a serrated tongue that looks like teeth and helps them keep their food in their mouths.

9.The horizontal pupil of a goat is rectangular.

10.The heart of the shrimp is teased on its head.

<> "Popular Science of Interesting Animal Knowledge."

1 camel's hump.

The hump of the camel is the main feature. But contrary to what most people think, the hump is not used to store water, but fat. When there is a shortage of food, fat can be converted into water and energy.

Another effect is to concentrate all the fat together, so that the rest of the body has no fat layer, so the camel can still maintain normal activities in the hot desert without causing "heat stroke".

In order to adapt to the harsh environment of the desert, camels have also evolved a lot of physiological mechanisms. Three layers of eyelids and two layers of eyelashes can be used to protect against sand and dust. The thick lips allow them to eat prickly plants that other creatures can't reach, and they can even control the closure of their nostrils to keep dust out of their nasal passages.

2 Penguin Parenting.

Penguins are oviparous animals, with females laying only one egg at a time, while males are responsible for the 6-week incubation period. Their abdomen acts as an incubator, providing a suitable environment for incubation and will not be damaged by external influences. During this period, the penguin father has to control the amount of food, and even needs to starve, for the sake of the unborn baby, he cannot jump into the sea to fish to satisfy his hunger, and all the energy is taken from the fat stored in the body.

Mother penguins, on the other hand, need to store their baby's food. They forage for food in warmer, fishy waters, and the food they swallow forms a thick layer of fat in their bodies. Before the little penguin breaks out of its shell, its mother arrives.

3 Ancient insects.

Butterflies are the phylum Arthropoda, Insecta, Lepidoptera, and a general term for the suborder Hammerhorn. There are about 14,000 species worldwide, most of which are found in the Americas. There are 1,200 species of butterflies in the vast lands of China, and they are brightly colored and colorful, with various spots on their wings and bodies.

Initiation. Butterflies are classified as lepidoptera, and tens of thousands of species fall under this category. As a plant that evolved from the Cretaceous onwards, it evolved with the evolution of flowering plants and pollinated them to reproduce. It can be said that it is the last type of creature in the evolution of insects.

(1) The rabbit uses the action of slapping the ground with its legs to convey information, and most of the rabbits who slap the ground with their hind legs are male rabbits, which is a way for it to express its emotions to female rabbits. (2) The largest monkey in the world is the baboon, and the smallest monkey is the marmoset. 3) When the dog is happy, it keeps wagging its tail.

When the dog is angry, it stretches its tail back. When the dog is panicked and frightened, it clamps its tail. 4) Leopards grind their claws on trees.

The stag rubs its horns against the trunk of a tree to sharpen the horns. Wild boars often grind their tusks in trees. 5) Polar bears wear thick white fur coats.

Seals and walruses have a thick layer of fat that keeps their bodies warm. 6)"Four is not like"Its real name is Elk, and it is a rare animal of our country.

Are these enough? Not enough yet.

The heart of the shrimp is located on its head, the slug has four noses, and the kangaroo does not fart. As a result of frequent falls from trees, about 50% of orangutans have broken bones. The ostrich's eyes are larger than its brain. A crocodile is an animal that cannot stick out its tongue.

Unlike cats and dogs that look white after shedding, tigers can still see clear patterns after shaving. Every tiger has different tiger stripes.

The ostrich is the only bird among the birds that has two toes, with large, thick, strong inner toes with hard claws. The outer toe is small and has no claws. The hind limbs are thick and powerful.

Ants have very high requirements for the humidity of the nest, they do not like the living environment that is too wet, and the humidity of the air before the rain becomes larger, which will make the nest wet, so at this time the ants will pour out the nest and move the home to a dry place.