Structural characteristics of flies, crickets, butterflies, locusts, silkworm moths, longhorn beetle

The basic structure of an insect's body.

Head construction. The head is the anterior segment of the insect's body and is the center of sensation and feeding. The head is made up of several body segments, and the outer wall is hard, forming a skull.

There is a pair of antennae on the upper front of the head, mouthparts (mouth) below, usually 1 pair of large compound eyes on both sides, and often 1 3 small single eyes on the top of the head. The morphology of these organs varies depending on the species of insects.

Chest construction. The thorax is a section of the insect's body that is immediately behind the head and is connected to the head by a retractable membrane. The thorax is the center of movement of insects and consists of three segments: anterior, mesothorax, and posterior thorax. Each thoracic segment has 1 pair of legs, and the middle and hind thorax usually have 1 pair of wings each.

The thorax is the center of movement of insects. The wings that can make insects fly grow on the chest, and the feet that can make insects walk also grow on the chest, which shows that the chest has a pivotal role in insects.

The thorax is composed of three segments: anterior, middle and posterior thoracic, and each thoracic segment has a pair of feet. Winged insects also have a pair of wings on each of the mid-thorax and hind thorax. The forethorax has no relationship with flight because it has no wings, and its degree of development is often related to the forefoot.

The praying mantis has a pair of well-developed capture forefeet, and its prothorax is also extended. Most winged insects have a much smaller anterior thorax than the middle and hind thorax. The mid- and hind-thorax are well developed in winged insects.

Abdominal structure. The abdomen is the last large segment of the insect's body, and the front is connected to the thorax. It is the center for insects to digest food and reproduce offspring.

The abdomen is generally 9 11 segments; A few species were reduced to 3 6 knots. The last segments are often merged or degenerate, sometimes the first segment merges with the last segment of the chest to form a thoracoabdominal segment, and the rest of the segments are very similar in structure, consisting of a dorsal plate and a ventral plate, and the first 8 segments usually have a pair of valves each. Each internode is connected by a folded membrane, so the abdomen of the insect can be freely expanded, such as locusts can elongate the abdomen when laying eggs, and lay eggs in deep soil, mainly relying on the effect of internode membranes.

The last section gives birth to a pair of tail whiskers, which plays a sensory role.

They are all insects, with a head, thorax, abdomen, 3 pairs of legs, a pair of antennae, and some have a pair of wings.

Categories: Education, Science, >> Science & Technology.

Analysis: From "The Book of Songs, Xiaoya, Xiaowan": "The moth has a son, and the moth wins and loses."

The moth is a small green worm, and the moth is a parasitic wasp. They often catch moths and store them in their nests, lay eggs in their bodies, and take them as food after the eggs hatch. The ancients mistakenly believed that the moth would not give birth to children, and fed the moth as a child, so they used the 'moth' as a metaphor for the righteous son.

Tao Hongjing, a medical scientist during the Northern and Southern Dynasties, did not believe that the moth was childless, and was determined to observe it himself to distinguish the authenticity. He found a nest of moths and found them both male and female. These moths carry the moth back to its nest, sting it half to death with a poisonous needle on its tail, and then lay eggs on it.

It turns out that the moth is not a righteous child, but is used as food for the offspring of the moth. Through targeted observations, the mystery of the millennium was revealed.

Allusion: "Romance of the Three Kingdoms" Liu Feng said to Meng Da: "Uncle is trapped, what can I do?"

Da said: "The soldiers of Eastern Wu are brave and brave; And the nine counties of Jingzhou already belong to them, and there is only Maicheng, which is the land of projectiles; I also heard that Cao Cao personally supervised the army of four or five hundred thousand, and stationed in Mopi: Measure the people of the mountain city such as us, and can you defeat the strong soldiers of the two families?

Don't be underestimated. Feng said: "I also know it."

Nai Guan Gong is my uncle, and he can't sit back and save him? Da Xiao said: "The general regards Guan Gong as his uncle, and I am afraid that Guan Gong may not take the general as his nephew."

When he heard about the general of Hanzhong Wang's first heir, Guan Gong was displeased. After the king of Hanzhong ascended the throne, he wanted to set up an heir, and asked Kong Ming, Kong Ming said: "This family matter is also, ask Guan and Zhang Keyun," the king of Hanzhong then sent people to Jingzhou to ask Guan Gong, Guan Gong thought that the general was the son of a moth, and could not be arrogated, and persuaded the king of Hanzhong to put the general far away in the land of Shangyong Mountain City, so as to put an end to future troubles.

Everyone knows about this, but doesn't the general know about it? Why is it still involved in the righteousness of uncles and nephews today, and want to take risks lightly? Feng said:

Although the gentleman's words are, what words are they used for? Da said: "But the mountain city was attached at the beginning, and the people's hearts were undecided, so they did not dare to build a second army, for fear of losing their defense."

Seal according to his words.

All are divided into three parts: head, thorax, and abdomen, and the chest has three pairs of feet (which is the most important). These are the basic characteristics of insects.

They are all insects, and they all have antennae.

Silkworm moth beneficial insects, with breeding to lose jujube wild sales to silkworm rock locust silk;

cockroaches are household pests, which are exterminated with insecticides;

Praying mantis is a beneficial insect in agriculture, protecting it and using it to eliminate pests;

flies household pests, exterminated with insecticides;

Locusts are agricultural pests, with both biological and chemical control to prevent them from eating crops in large quantities;

Dragonfly is a beneficial insect and protects it to get rid of pests.