Structure and Function of the Human Digestive System By Caitlin Ong Organs of the Digestive System Mouth Structure: The mouth consists of the upper and lower jaw‚ that contain gums which hold teeth‚ the roof of the mouth is the palate and the tongue occupies the floor of the mouth. The salivary glands have ducts that open in the mouth. Function: The mouth is where the first step of digestion begins. Known as mechanical digestion‚ this involves chewing with your teeth to break the food
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Unicellular organism From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search "Single-celled" redirects here. For prison cell assignment‚ see Single-celling. Valonia ventricosa is among the largest unicellular species. A unicellular organism‚ also known as a single-celled organism‚ is an organism that consists of only one cell‚ unlike a multicellular organism that consists of multiple cells. Historically the simple single celled organisms have sometimes been referred to as monads
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Why should tropical rain forests be conserved? Tropical rainforests are thought to posses more plants and animals than any other forests on earth. Most tropical rainforests are located around and near the equator‚ they have existed on earth for hundreds of millions of years. But they are among the most endangered ecosystems globally due to humans. They are an important part of human life and are know as the “lungs of the planet” they have many animals‚ and many natural medicines come from tropical
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SCIENCE CELL – STRUCTURE AND FUNCTIONS Cell – Structure and Functions Cell as the Basic Unit of Life The cell is the basic structural and functional unit of all living organisms. It is the smallest part of the body of an organism‚ is capable of independent existence and is able to perform the essential functions of life. Discovery of the Cell Robert Hooke observed cork cells under a simple microscope designed by him. He observed compartments resembling honeycombs and each compartment
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Unit 7 P2 : Illustrate the structure and function of two major body systems and how they interrelate. ******** The two major body systems: 1. Circulatory system: The circulatory system is composed of: *the heart‚which is an organ made up of cardiac muscle with four chambers(left and right ventricles; left and right atrium or auricle); the heart is a pumping mechanism that services two branches of transport: -the pulmonary
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BORNEO RAINFOREST The tropical rainforest is earth’s most complex biome in terms of both structure and species diversity. Tropical Rainforests can be found in South and Central America‚ Africa‚ Oceania (the islands around Australia)‚ and Asia (15).Tropical rainforests cover only about 7% of the Earth’s surface (13‚ )All Tropical Rainforests have similar characteristics including climate‚ precipitation‚ etc. They are located in a band around the equator. However‚ not every tropical rainforest can
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Cellular organelle structure and function Nucleus The Nucleus is comprised of the pore perforated nuclear membranes‚ nucleoplasm‚ chromatin and the nucleolus at the core. The nuclear envelope consists of an inner and outer membrane that forms the outer structure. Contained within the nuclear membrane are nucloplasm which is the fluid medium in which the chromatin is present‚ chromatin being the genetic material. At the core of the nucleus is the nucleolus‚ where ribosomes are synthesized. The
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Why is water important for living organisms? Water is very important in all living organisms‚ it is vital for many different things. Around 70% of our body weight is due to water. The quantity is high in organs such as lungs and brain and fluids such as blood‚ lymph‚ saliva and secretions by the organs of the digestive system. First of all water is vital in the regulation of body temperature to depending on the temperature mammals will alter the amount they sweat. If they are to warm the amount
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I. Describe the structure and function of the nucleus and mitochondria. The mitochondria is a semi-autonomous organelle which reproduces by bynary fission and has its own DNA. Its main function is to produce the energy intermediate ATP‚ through ATP synthase. Mitochondria could be considered a cell inside a cell. It has its own membranes (inner and outer membranes)‚ its ribosomes (to produce the proteins encoded in its DNA)‚ a matrix -- where aerobic respiration occurs. The invaginations of the inner
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the glomerulus. A good deal of fluid from the blood filters into the capsule. Large proteins and whole blood cells are left behind due to the fact that their too big to pass through the filters along with the plasma or blood fluid. There are four main parts of the nephron tubule: the proximal convoluted tubule‚ the U-shaped loop of Henle‚ the distal convoluted tubule‚ and the collecting duct. A substantial amount of resorption takes place in the proximal convoluted tubule. The small proteins‚ glucose
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