The respiratory organs of reptiles are the lungs, and some also breathe through the skin, and their skin is covered with scales. They are temperature-changing animals and cannot control the temperature in the body, so reptiles can't be found in cold areas. In winter, they have to hibernate for winter.
Reptiles fall into three categories: turtles, crocodiles, and snake lizards.
1 turtle and toads
There are about 330 such reptiles. They are short and wide, and their soft bodies are hidden in thick, hard shells. They have no teeth, but the cheekbones are very hard and can cut off food.
The turtle's sense of smell and touch are quite developed, and the sense of hearing and vision are not sharp. Most turtles are mild and not aggressive. When they encounter enemies, they shrink their heads and feet and hide them in the tortoiseshell. Looking at the hard shell of the stone, the enemy often has nothing to do with it.
It is with this special skill that the turtle has lived on the earth for 200 million years and will continue to live in peace and contentment. Turtles have a long life span, generally around 70 years, and most of the tortoises can live to about 100 years old.
The tortoise's reproductive mode is oviparous. They are very secretive when spawning. During the breeding season every year, the female turtle creeps up to the beach by the cover of the night and chooses a place with sufficient sunshine and moderate temperature as the spawning ground.
Before spawning, the turtle will urinate on the sand first, let the soil become wet and soft, and then use the hindfoot to dig the hole. When the hole is dug to more than 10 cm deep, the turtle begins to lay eggs in the hole, the turtle eggs, and A table tennis ball is about the same size, with a hard layer of calcareous shell on the outside.
This shell is the protective layer of the egg, but it is a layer of obstacles for the young turtle that is about to rise. Fortunately, there is a hard protrusion between the mouth and nose of the young turtle. With this sheller The young turtle struggled to drill, grind, and struggle. Finally, he drilled a small hole and tried his best to break the eggshell with his head.
The young turtle began its first breath. With the early rise of the young turtle, its survival crisis night is coming. Young turtles are foods such as seabirds, large lizards, dogs, and snakes. Young turtles are often eaten on the way to the sea or riverside and ponds. Of the 100 young turtles, there are only a few that survive.
Turtles are the largest turtles. Their arm length is generally around 100 cm. In addition to spawning or sunbathing, turtles have been living in the sea, and their feet have changed into fins, which allows turtles to swim freely in the water.
Turtles have three feeding habits. The tortoises are mostly herbivorous and feed on straw and plant leaves. Sea turtles are mostly carnivorous, and they prey on mollusks, shrimps, and crabs. Freshwater turtles mostly eat omnivorous turtles. They eat vegetarian food such as aquatic plants and also eat river shrimp, frogs, and fish.
There are about 32 known cockroaches. They live in freshwater. He often sneaked into the mud at the bottom of the water, so his carapace became flat and flat. The cockroaches between the toes are very developed, and they move quickly in the water and swim quickly. He is a natural diving athlete with a long nose and a long nose, which allows him to squat under the water and breathe his nose out of the water.
2 Crocodile
The crocodile is the largest and most dangerous reptile in existence and the most advanced of the reptiles. There are 22 species of crocodiles living in tropical regions around the world. The biggest crocodile is the Indian-Pacific crocodile, also known as the saltwater crocodile, which is 7 meters long and weighs about 300 kilograms.
It can still be seen in the ocean 1000 kilometers offshore. Although they have different habitats, different sizes, and habits, they all have a ferocious appearance. The crocodile's body is long and long, covered with scales. Its teeth resemble a row of small daggers that grow in the mouth; the tail functions as a rudder and paddle for rowing and controlling direction.
Crocodiles are carnivorous animals that feed on insects, frogs, snails, fish, turtles, birds and large mammals. The crocodiles are very embarrassed when they prey. They always hide their bodies in the water, leaving only the eyes, ears and nose protruding from the water.
From a distance, it looks like a dead wood floating on the water. When the prey on the shore was discovered, the "dry wood" would move to the shore without knowing it, and then threw it into the prey with lightning speed, but it and drag it into the water, after several struggles. The prey becomes a crocodile food.
There are hundreds of teeth in a crocodile's life - but not at the same time. When crocodile hunts, they often break or lose their teeth, so they will grow new teeth as a substitute. The crocodile's tears is synonymous with hypocrisy. In fact, the crocodile tears have nothing to do with the crocodile's emotions.
This is the way it excretes excess salt in the body. The crocodile does not sweat and the kidneys have deteriorated. It has a special excretory gland that discharges salt, and its discharge tube is distributed around the eyes. The crocodile's tears are actually a salt solution.
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