Why do you bleed after being bitten by a leech?

In the daily process of learning, everyone has memorized a lot of knowledge points, and they must be very familiar with them! Knowledge points are content that "others can understand after reading it" or "I can master it through practice." So, what are the knowledge points? The following is why I have compiled for you why you will bleed after being bitten by a leech for your reference. I hope it can help friends in need.

For animals like leeches, there may be many children who have never seen or even heard of them. But don't underestimate it. It looks small, but it has a "magic". Once bitten by it, blood will immediately gush out. If you don't take measures quickly, the blood will Keep flowing. Are the children very curious about why this happens? Today I will tell you the mystery.

Leech is an annelid, shaped a bit like an earthworm, but its body is slightly flat and varies in length. The large one is 20 centimeters long, and the small one is as long as 1 centimeter. The leech's body secretes a mucus that lubricates the body. They live in lakes, streams, ditches, or on aquatic plants near water, or under the water. Sometimes they often climb into damp grass or trees near water.

They become active in late spring and early summer. In spring, leeches can often be found hiding in the mud of dry ponds. Leeches mainly feed on blood. In the center of the head sucker is its mouth, which has three fleshy jaws. The jaws have many tiny serrations that can cut people's skin and create a "Y" shaped wound.

The saliva it secretes when biting people contains an anticoagulant, also called hirudin, which can prevent the blood from coagulating in the wound. Therefore, after people are bitten by a leech, the wound will bleed. This is a wonderful way for leech to feed. It has a suction cup on the front and rear ends of its body. It uses the suction cup to adsorb the body to the human skin, so that it can continue to suck.

After a full meal, you can stop eating for a long time. When a leech bites a person, it sucks so tightly onto the person's skin that it's difficult to pull it off. When encountering this situation, you can soak it with salt water and the leech will be violently stimulated and fall down automatically. Squeeze some of the blood out of the wound with your hands to stop bleeding.

Expansion: Leech Composition Part 1

Childhood is innocent and unforgettable. In childhood, we may weave beautiful stories one after another, or we may have a quarrel, and once in a lifetime we discover that small things that may seem trivial to our parents may be full of happiness and breed ideals in our hearts. , became the driving force for pursuit. On the last day of the Dragon Boat Festival, my father led the team and let our family climb the Zhuji Dongbai Mountain Loop in the rain. This mountain climbing trip made me meet the disgusting and interesting leech for the first time.

Due to the continuous rainy days and the heavy rain early this morning, the streams in the mountains were extremely abundant. They gushed down the valleys with great force. There were small puddles everywhere along the way and the muddy water was quite large. There are so many, even the weeds and branches on the roadside are dripping with water. Heading towards the top of the mountain, after just a few steps, our shoes and socks were all wet and covered with mud, water and rotten grass. It was very uncomfortable to have our feet wrapped in wet socks. However, because of the rain, we saw several very spectacular waterfalls. , and we really experienced the artistic conception of "flying down three thousand feet", and because of the rainy day, we saw the beautiful scenery shrouded in clouds and mist.

Just as we were walking forward, admiring the beautiful scenery and chatting, we met some senior travel friends. They reminded us to pay attention to whether there are leeches on our feet, and asked us to find a dry place and carefully check the soles and sock. wow, what? And leeches? I was startled and muttered in my mind. Then my brother and I kept asking our parents, what is a leech? It turns out that leech, whose scientific name is leech, likes moist and muddy water, loves blood and is poisonous. The suction cup of its mouth is very strong, and it is not easy to get sucked on people's legs. So I not only wanted to see if there was a leech on my foot, but also wanted to see what it looked like. But my father said, "Don't make a fuss. When we were young, we often had a dozen leeches on our legs in the rice fields in the countryside. It's okay." Humph, I don’t believe it. Are you not afraid of being bitten by a leech? I just wasn't convinced.

Finally we found a dry boulder on the hillside. We all sat down and started checking our legs and feet. At this time, my father really found a few little leeches on his younger brother's shoes, and then took off his younger brother's shoes and socks. Fortunately, there were no leeches on his legs. My mother and I didn't find any of them on our shoes. Finally, Dad started to check himself. Tragedy happened. Two leeches were sucking on his legs. When Dad rolled up his trousers, the leech's head was really sucking the meat on his legs, and its little tail was still raised and dangling, as if While sucking blood, enjoying human blood steamed buns, and dancing happily! When I looked at this dark monster that looked like an earthworm but was different from an earthworm, I felt terrified. I felt goosebumps all over my body. I was so disgusted that I screamed uncontrollably. Dad was not anxious at all. He smiled while using his fingers to grab the soft leech on his leg. He twisted it several times, but it still couldn't be unscrewed. Finally, he pulled the little tail hard and pulled the leech away. When he came down and fell far to the ground, my father's leg began to bleed.

Then I found several more strips on his shoes. Seeing my father's careless look, I gradually felt better and returned to my naughty state. I said, "Dad, you are so popular that even leeches follow you." I’m so familiar with you, so I’m rubbing myself hard against you!” "Of course. A handsome guy like me is naturally loved by everyone." Hey, what a narcissistic dad!

Next, leeches will accompany us on all our trips. Every once in a while, we will check if there are any leeches on our legs, because Dad said that if we don’t remove the leeches in time, they will last for a long time. If sucked onto meat, it may penetrate into blood vessels, and if the blood vessels are broken, it may cause serious illness. We kept checking and making fun of leeches. Occasionally, my younger brother would suddenly shout, "Sister, there are leeches on your legs." This scared me and I quickly held my feet and looked left and right. When I checked carefully, my younger brother was there. I was laughing from ear to ear. It turned out that the little boy was fooling me. Then my mother said, "Hey, Yangyang, what's on your leg? It looks like an earthworm!" "Dad, help me take a look, it must be a leech!" My brother also became nervous, and my mother couldn't help laughing. Only then did he realize that he had been fooled, and then we all laughed together!

In this way, we fought with leeches all the way through muddy water and streams. It took us almost 4 hours to go down from Taibai Peak to the foot of the mountain. On a stone slab, we checked carefully, brother. I also found a leech sucking on my leg. After I pulled it off, there was a small dark purple circle on the little fresh meat on his leg. My mother and I didn't find a leech on our legs. It was God's will. Leeches also know how to cherish fragrance and cherish jade? Dad found a few strips on the soles of his shoes. After cleaning them, we got in the car and headed home. But after driving for a while, my father said that his left leg was a little itchy and painful. He rolled up his trouser leg, and wow, a leech was sucking blood on his leg happily! Oh my gosh, I've obviously checked it carefully, but there's still something there? So whenever I feel itchy, I wonder, is a leech biting me?

When I got home, I found that my father’s legs were still bleeding. It turned out that the saliva secreted by leech suckers contains anti-blood coagulation toxins, which can prevent blood clotting, so my father had to put on a band-aid.

Oh, the beautiful Dongbai Mountain, oh, the spectacular waterfall, oh, the leech that makes me uneasy just thinking about it! What an unforgettable trip!

Leech Composition Part 2

Far away from my hometown, I haven’t seen leeches for decades. Although it is very disgusting and unpopular, in my mind, like the first lover in my life, the trauma in my heart can never be erased.

What is a leech? Maybe many people have never seen it. It is a unique little animal that lives by sucking blood. In this regard, no matter what kind of animal in the world, no matter how tall or ferocious it is, if it is discovered, it will try its best to bite you and suck your blood. Despite its small size, softness, smoothness and unspectacular appearance, it is still called the king of kings in the animal world.

The reason why people are in great awe of leeches is something I experienced personally when I was a child. I remember when I was seven years old, I just entered the first grade of elementary school. After school in the afternoon, the weather was extremely hot. Five or six of my classmates and I went to take a bath in Tangmeng Pond, not far from school. On a hot summer day, it was the leech breeding season. When I was having fun, a leech secretly bit my vagina and sucked my blood silently. It was painless and painless, but I didn't notice it in time. After everyone took a shower and came ashore, I felt something soft and tired across my vagina. I was so scared that I jumped, jumped and cried. At this time, there were no adults around and they were all children. They did not understand what this round, soft, noseless and purposeless thing was, so they were all scared and ran away. At this moment, I was the only one left at the fish pond intersection, and I was even more frightened. I hugged my head and cried, while jumping hard. After about ten minutes, the strange round and soft thing finally fell from my lower body to the ground.

Before I was bitten by a leech, I had long heard my father tell the story about leeches in "The Hunting and Watching the Bleeding Man" when I was a child, but I had never actually seen a leech. Dad said that one night, the sky was so dark that he couldn't see his fingers. A young man was sitting next to a big tree in Wuzhi Mountain, drinking and hunting. When he was chattering drunk, a leech took advantage of the situation, climbed up Li Zai's lower body secretly, bit his vagina and sucked blood. It wasn't until after the leech had eaten its fill that Li Zai's pants were soaked with blood from his wound. Only then did he realize that it was his own private parts that were bleeding. So, he hurriedly packed up his hunting tools and returned home overnight. From then on, he no longer dared to hunt... After dividing the fields into households and working alone, he allowed the leeches to run wild and provide them with an excellent growing space, allowing them to spread unscrupulously from the mountains to the outside and deep into the fields. They breed in fish ponds and ditches, causing people a lot of trouble and making a lot of jokes. There is this description of the "Leech's Story" in the novel "Dawn" written by Nian Ren: Suddenly, not far to the right of Wang Xuerui, a lesbian started shouting. It turned out that a female college student from the Northeast who had just joined the army last year suddenly surprised everyone around her with her shout. Not knowing what had happened, everyone stopped cutting rice, stretched their waists and stood up, and looked at the lesbian. . At this time, Li Xiuying, the village women's director who was cutting rice next to Wang Xuerui, saw the lesbian jumping around in the field, so she immediately got up and walked over. When she lowered her head, she saw that it was a leech biting her calf. She calmly said to Xie Xiaoli: "Don't be afraid, this is a leech, I will pull it out for you and it will be fine."

As she spoke, she dipped some saliva on the fingers of her right hand, lowered her head, and grabbed the leech with two fingers covered in saliva. As soon as the leech encountered the saliva, it immediately fell off Xie Xiaoli's calf. At this moment, Xie Xiaoli saw the strange thing falling to the ground, and immediately breathed a sigh of relief and jumped up happily. She walked forward and hugged Li Xiuying, the women's director, tightly, and said with shame and joy: "Really, I have never seen this damn thing before. It's long and soft, has no nose and no eyes, it's really scary; if it's hard and long , I’m not afraid.” What Xie Xiaoli said made everyone laugh "hahaha" unintentionally...

Although leeches are very hateful, they are also vulnerable. In the past few years, the villagers saw leeches everywhere causing trouble and sucking people's blood and sweat. Crisis was everywhere, and a people's war was launched to suppress the leeches. The fields, fish ponds, and ditches were drained of water, basked in the sun, and pesticides were sprayed on them, leaving them nowhere to hide and kill. die. Although some extremely cunning leeches escaped into the mountains and hid alive, they did not dare to come out to cause trouble when they saw that all their brothers outside the mountains were killed. However, the villagers have already been prepared. If the leeches hiding in the mountains dare to come out to cause trouble and suck people's blood and sweat, they will be "hit by tigers, flies and leeches all at once" without mercy.