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Lab report on earthworm
Practical report about an earthworm
Practical report about an earthworm
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Full Nefertiti of Egypt declared them sacred. Aristotle known as them the digestive tract of the world. Charles Darwin felt they performed a significant part within the history around the globe. What animal gained the admiration of these celebrities? The common-or-garden earthworm.
Because you will see, earthworms should be respected. True, they're slimy plus they wriggle. But even these characteristics, which we may consider unattractive, can inspire a feeling of awe when you become familiar with the earthworm just a little better. All that you should do is bend lower and upturn a clod of soil or disturb a layer of leaf litter, and you've got joined the fascinating realm of earthworms.
Simple Brain, Astounding Talents
Take particular notice in an earthworm, and you will see that its is built of ringed segments that appear to be just like a row of miniature raspberry braid bunched tightly together. Each segment is run by two muscle groups. One group, just under the skin layers, forms a diamond ring round the earthworm. Beneath this layer, the 2nd group stretches across the earthworm. The earthworm moves by growing and contracting these opposing muscles, flexing segment after segment inside a rhythmic pulse that ripples lower its body.
Should you place an earthworm inside your hands, without doubt it'll writhe and wriggle. The earthworm responds by doing this because its is bristling with sense organs-as much as 1,900 on only one segment. These receptors provide the earthworm a feeling of touch, the ability to taste, and the opportunity to identify light.
The earthworm grips the soil using small, hairlike forecasts known as setae. Each segment from the earthworm has teams of setae that act somewhat such as the oars of the rowb...
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...her organic matter. These earthworms consume between 50 and 100 % that belongs to them bodyweight every day and convey a nutrient-wealthy fertilizer that's promoted broadly.
Research has revealed another possible use for earthworms-like a food source. Earthworms retain the same advantageous proteins as beef. On the dry weight basis, they're full of 60 % protein and 10 % body fat and contain calcium and phosphorus. Already, in certain lands, people eat earthworm pies. In other areas around the globe, they fry worms as well as eat them raw.
While earthworms may never become typically the most popular creatures on the planet, the planet would be described as a different place without one. So next time you admire a tranquil country scene, spare a concept for that military of worms which are below your ft, busily plowing, fertilizing, and looking after that lovely view.
There is no doubt that arthropods are an extremely successful group of animals, with an estimated 5-10 million species worldwide[1], and this can be attributed to having an exoskeleton; it provides many benefits, such as protection from parasitism and other threats. However, one major disadvantage of having an exoskeleton is the limitations that an inelastic cuticle can place on growth. The exoskeleton provides protection, but when freshly moulted the animal is soft and vulnerable, as well as having limited mobility and use of appendages; many seek shelter before moulting[2]. There are similarities and differences between the moult cycles of all the arthropods, however only crustaceans and insects will be discussed here.
I learned that the phylum Annelids can consist of many creatures such as earthworms, leeches, and scale worms can adapt to a variety of environments. Annelids’ bodies are divided into segments which are seen as rings by the naked eye. They have muscles which help them move by contracting their longitudinal and circular muscles. When Annelids take in food, the food particles travel through one end of the body and are excreted out the other side. The video enhanced my understanding about Annelids because without seeing different species and what classified them as Annelids I would have never known an earthworm or a leech fell into that phylum.
With over nine hundred and seventy one tons, the United States is the country with the highest amount of caffeine consumption in the world. This chemical compound is known to have many affects on our bodies, primarily in our hearts. Caffeine has been shown to increase blood pressure and heart rate. However, as far as scientists know, the affects of caffeine may affect invertebrates differently than it affects vertebrates. The present experiment studied blackworms - Lumbriculus variegatus in the phylum Annelida- in solutions with different amounts of caffeine to see if it affected their pulse under a compound microscope. Worms do not have hearts; they have aortic arches that contract to push the blood into the dorsal and ventral
Sure, you can imagine a crab sitting on the bottom of the ocean, but if you came across a pill bug you probably wouldn't scream, 'Check out that crustacean!', but pill bugs are crustaceans that live on land! There are too many groups to mention here, so let's just highlight a few, starting with Copepods, which are extremely small crustaceans. There are over 13,000 species that are considered Copepods. Some inhabit freshwater, some live in saltwater, others live in moss and some are even parasitic. The Copepod's claim to fame is probably their importance in the food
These findings are in agreement with the results of a similar experiment which tested the effect of temperature on locomotion of the Lymnaea stagnalis, a close relative of to the C. nemoralis (Sidorov, 2000). The experiment showed that the snails moved at a rate of 1.4mm/s in temperatures from 4-6 degrees Celsius, whereas some snails moved at a mean rate of 5.4 mm/s in temperatures ranging from 24-26 degrees Celsius. In our experiment, the average rate of movement was 2.38mm/s in 5 degrees Ce...
Fox, R. 2001. Invertebrate Anatomy OnLine: Artemia Franciscana. Lander University. http://webs.lander.edu/rsfox/invertebrates/artemia.html, retrieved February 13, 2011.
Young hookworms (larvae) can enter the skin and travel to the lungs through the bloodstream. The hookworms can move up the windpipe (trachea) and down into the digestive tract. Adult hookworms can live for a year or more inside the small intestine. An undiagnosed and untreated infection can eventually lead to blood loss from the intestines and cause a low level of iron in the blood (iron deficiency anemia).
Mao Dun, author of "Spring Silkworms", was a twentieth century Chinese novelist, critic, organizer, editor, and advocate for Chinese Communism. According to David Wang, Mao Dun was one of the most versatile Chinese literati among the May Fourth generation. Mao Dun was an advocate and practitioner of European naturalism. Motivated by history and politics, Mao Dun has introduced western literary ideas to China in his novels. As a left wing writer Mao Dun focuses on the peasant's point of view and relies on his depiction of reality to evoke change. A good example of this style of writing is the story "Spring Silkworms".
Jellyfish move by expanding and contracting to push the water behind them. In between each contraction and expansion is a pause so that a vortex can be created ...
The earthworm digestive system is one of the simplest digestive systems compared to the frog or a human. The digestive system is section off into certain parts and each part has a certain function in the digestive process. The earthworm’s digestive system consists of the pharynx, the esophagus, crop, the intestine, and the gizzard. Each organ has a specific contribution to the digestion in an earthworm. The food, which is usually soil, passes through the mouth and is swallowed into the digestive system through the pharynx. Then, the soil passes down the esophagus which has enzymes that help to rid the earthworm’s body of extra calcium that...
"Photorhabdus and Xenorhabdus bacteria colonize the intestines of the infective soil-dwelling stage of entomophagous nematodes, Heterorhabditis and Steinernema, respectively. These nematodes infect susceptible insect larvae and release the bacteria into the insect blood. The bacteria kill the insect larvae and convert the cadaver into a food source suitable for nematode growth and development. After several rounds of reproduction the nematodes are recolonized by the bacteria before emerging from the insect cadaver into the soil to search for a new host.
"We are for breeding purposes..There is supposed to be nothing entertaining about us, no room is to be permitted for the flowering of secret lusts..We are two-legged wombs, that's all: sacred vessels, ambulatory chalices (p. 176)."
Arachnida is a subphylum of Arthropoda, consisting of over 100 000 species, many of them being parasites which can carry disease. They are found in all environments, and mostly have eight legs, which is a feature, together with the fact that they do not have wings or antennae, often used to distinguish them from the other subphyla, though there are exceptions. They include spiders, scorpions, ticks and mites. Their bodies are divided up into three parts: the cephalothorax, the opisthosoma and the thorax, and use a type of lung for gas exchange. Most Arachnids are carnivorous, and eat pre-digested insects and other small animals. They reproduce using internal reproduction usually lay eggs, except for the scorpion which bears living young. The word ‘Arachnid’ comes from the Greek word ‘Arachne’ meaning ‘spider’.
...m wooden peg legs and hooks to synthetic arms that can move on their own due to movement impulses from their brain.
One of the first reason why insects are so successful because they possess a tough exoskeleton that is covered with a waxy water repellant layer. The exoskeleton of insects also has helped them survive. An insect's external skeleton, or exoskeleton, is made of semi-rigid plates and tubes. In insects, these plates are made of a plastic like material called chitin along with a tough protein. A waterproof wax covers the plates and prevents the insect's internal tissues from drying out. Insect exoskeletons are highly effective as a body framework, but they have two drawbacks: they cannot grow once they have formed, and like a suit of armor, they become too heavy to move when they reach a certain size. Insects overcome the first problem by periodically molting their exoskeleton and growing a larger one in its place. Insects have not evolved ways to solve the problem of increasing weight, and this is one of the reasons why insects are relatively small. But compared to animals the Exoskeletons d...