Similarities And Differences Between Theses Cells And The Mammalian Body

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Task 1 – Cells, DNA and Tissues (1.1, 1.2, 1.3, 2.1) Word count guideline: 1500 words Cells - There are many different cells found in the human body; they have many different shapes and many different functions. Cells that naturally occur within the mammalian body are collectively called eukaryotic; cells that do not naturally occur in the mammalian body are collectively called prokaryotic. Question 1 a) Compare and contrast the structure of these two cell types. You must include in your written work, a fully annotated diagram of each cell type. You will need to draw and label your diagrams, scan or photograph them, and embed the diagrams into your assignment. The main difference between theses cells is the eukaryotic cell has a nucleus, that is bound by a double membrane and the prokaryotic does not. The nucleus holds DNA in a smaller chamber to increase the efficiency in this big cell. This however is not needed in the prokaryotic cell as it is smaller in size all information needed is close together. Prokaryotic cells do have DNA as well and same functions and located in the nucleoid area but no boundary. Eukaryotic DNA is straight and complex with proteins compared to the DNA in the Prokaryotic cell being circular, no proteins and not formed into chromosomes. Eukaryotic cell contains many chromosomes but the prokaryotic cell only has one circular DNA. The smaller and simpler the prokaryotic cell the less genes needed to function efficiently compared to the eukaryotic cell. Both of these cell types have many ribosomes, but eukaryotic cells tend to have larger and more complex than the prokaryotic cells. Ribosomes are made out of RNA molecules and different proteins. Eukaryotic ribosomes are made up of five different k... ... middle of paper ... ...gether. Connective tissue is the most abundant, widely distributed, and varied type of tissue. It includes fibrous tissues, fat, cartilage, bone, bone marrow, and blood. 3. Muscle tissue is made up of muscle fibres these contain lots of myofibrils.The myofibrils are the parts that cause the process for contractions of the muscles. There are three types of muscle tissue skeletal (e.g attached to bones ), smooth (e.g organs such as intestines, blood vessels) and cardiac (the heart). 4. Nervous tissue is made up of two types of nerve cells. Neurons that have the cell body, axons and dendrites. The other type are neuroglia cells and they support the functions of the neurons. Neurons are designed to send messages from stimuli to create movement. Nervous tissue is found central nervous system (brain and spinal cord) and peripheral nervous system (extends all over the body).

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