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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.
Fox, R. 2001. Invertebrate Anatomy OnLine: Artemia Franciscana. Lander University. http://webs.lander.edu/rsfox/invertebrates/artemia.html, retrieved February 13, 2011.
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
Planarians are free-living, carnivorous flatworms found in the Phylum Platyhelminthes, Class Turbellaria. Although the Phylum Platyhelminthes is known for having the animals with the most parasitic species, the class Turbellaria which consist of the Planaria, are a non-parasitic species. Platyhelminthes which translates to "flat worm" are triploblastic animals. This means that they have three tissue layers, the endoderm, mesoderm, and ectoderm. Planaria also are monoecious organisms, meaning that they have both female and male sex organs in one organism. Another characteristic of the Planaria is that they do not have a true body cavity, meaning that they are acoelomate organisms.
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 ...
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...
Retrieved 14 May 2014, from http://www.teachpe.com/a_level_analysis/movement_analysis_webpage.html. Thibodeau, G., & Patton, K. (1993). "The Species of the World. " Chapter ten: Anatomy of the muscular system. In Anatomy and Physiology (1st ed., p. 252).
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".
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).
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...
...m wooden peg legs and hooks to synthetic arms that can move on their own due to movement impulses from their brain.
"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’.
There are three different types of muscles in the body, and the first to be talked about are skeletal muscles. The body consists of about 640 skeletal muscles and they just so happen to be the only voluntary or (controlled) muscles. Their main function is to contract and expand so that your bones are able to move. Most skeletal muscles are attached to bones or joints so that the muscle can either expand or contract to create motion. They consist of band like fibers attached and bundled together that run along the bone. These fibers are held together by connective tissue called epimysium, which also protects the muscle. Skeletal muscle is what makes the body able to walk and move, without these skeletal muscles the body could not function properly because it would have nothing to rely on for stabilization and strength. They contain what is called striated cells, which is cells that are shaped like bands and are individual, they stretch out the length of the muscle so that they are able to contract with it and these cells are also what give the muscle energy through respiration of proteins fats and glucose which is the energy supplement for all muscles. For example refer to figure 1-1 1-4 and1-5 for the cell
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...