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    Porifera Essay

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    The world we live in today is full of an exceptional variety of animals. The time it took to conclude to the various sorts of species seen today has been throughout a period of millions of years. The vast majority of these animals are accredited to evolutionary advancements. When the environment changes, organisms have become accustomed to changing to fit their environment, to ensure their species does not die off. These physical changes have resulted in different phyla, ranging from basic structures

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    Annelids: 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

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    Because they are grouped in the same kingdom, the nine animal phyla share the same fundamental characteristics- they are multicellular, heterotrophic eukaryotes that obtain nutrients through ingestion, they lack cell walls, they have nervous tissue and muscle tissue, and they reproduce sexually and have a unique embryonic life cycle. However, the animal phyla have a great number of differences as well. Some are visible to the naked eye, while others are less obvious, and still more cannot even be

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    Molluscs

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    middle. These cilia function by propelling trochophore through the water and drawing food into their mouths. Trochopheres that are free-swimming also aid in the dispersal of other marine mollusks. However, terrene mollusks and many marine-living annelids devel... ... middle of paper ... ...ability of a mollusk’s muscular foot to grasp things, such as food, has been adapted into what are now the tentacles of an octopus or squid. The calcium-carbonate shell found in most mollusks is a variety of

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    marine worms

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    Flatworms belong to the phylum Platyhelminthes. They have the simplest body plan of all bilaterally symmetrical animals. They are called flatworms because their bodies are compressed. The mouth is the only opening into the digestive cavity the flatworms have. Food is taken in through this hole and wastes are discharged also through this hole. Flatworms have a well-defined nervous, muscular, excretory, and reproductive system. The flatworm distributes the food it digests through a digestive tube that

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    All earthworms are hermaphrodites which means they have both male and female reproductive organs in the one individual. When two individuals meet, Hermaphroditism makes two possible exchanges of sperm instead of one. The two Earthworms inseminate each other and after this process the eggs are produced. To complete this process takes around 24hrs. Mating usually occurs when the ground is wet following rain. Most often Earthworms protrude the anterior end and mate with another earthworm in an adjacent

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    Introduction Fossil records indicate life has existed on this planet for at least 3.8 billion years. Most species that have ever existed are now extinct, yet the diversity of life on Earth is still so tremendous and complex scientists estimate there are 10-100 million species yet to be documented. Those that have been documented, have been categorized it into three domains, six kingdoms, twenty-nine phyla, and countless more subdivisions. Seemingly in spite of this diversity, a common ancestry unites

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    Nematoda and Platyhelminthes Within this lab we discussed and viewed platyhelminthes which is the scientific term for flatworm. The flat worms are phylum simple soft, bodied invertebrate animals. There are about twenty five thousand known species; they are the largest phylum of acoelomates. Flatworms are found in marine, freshwater, and even damp terrestrial environments. Most flatworms are free living, but many are parasitic. There are four classes: Trematoda (flukes) Cestoda (tapeworms), Monoglenea

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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

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    Most animal phyla originated in a relatively brief span of geological time, however the diversity among them is extraordinary. Every organism is very unique a detailed in certain ways, comparisons of certain types of organisms can be very difficult. The class in which will be compared is that of the invertebrates. The main difference between coelomate and acoelomate body plans are that coelomates have a true coelom, which is a fluid-filled body cavity completely lined by tissue which is derived from

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