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Showing posts from January, 2024

Tissue

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 A tissue is a collection of cells that work together to perform certain tasks and typically share an embryonic origin. Four fundamental categories can be used to categorize animal tissues based on their form and function. 1. Epithelial Tissue The cells that make up the membranes that line and cover the body's surfaces, as well as the glands that are formed from these membranes, make up an epithelial tissue or epithelium. There is some intercellular space between epithelial cells since they are densely packed and kept together by numerous cell connections. Because it does not have its own blood supply, epithelial tissue is avascular. Epithelial tissue plays many roles such as protection, filtration, secretion, absorption and excretion. Cell shapes: There are 3 basic shapes - Squamous cells are arranged like floor tiles and are thin Cuboidal cells are as tall as they are wide and are shaped like cubes or hexagons Columnar cells are much taller than they are w...

Fibre

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  Dietary Fibres Dietary fiber is the amount of food that comes from plant cells and is indigestible and unabsorbed to humans due to the lack of basic enzymes. Chemically, it is a polysaccharide. Fibre is present in grains, fruits, and vegetables, boosts general wellbeing, aids in preventing constipation, and improves digestive health. It contributes to a balanced and healthful eating pattern by giving the diet more volume without adding calories. Types of Fibre Fibre is classified into two types: Soluble fibre Insoluble fibre Soluble Fibre Soluble fibre is a type of dietary fiber that dissolves in water and forms a gel-like substance in the digestive tract. Unlike insoluble fibre, which remains unchanged as it passes through the digestive system, soluble fibre undergoes a transformation, creating a viscous solution that plays a crucial role in various aspects of human health. This type of fibre is found in foods such as oats, barley, beans, fruits, and vege...

Minerals

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Minerals are essential nutrients crucial for various bodily functions. They play a vital role in maintaining strong bones and teeth, supporting nerve function, and ensuring a healthy metabolism. While needed in smaller amounts compared to vitamins, they are equally indispensable for overall well-being. Minerals are obtained through a balanced diet, as the body cannot produce them on its own. Their deficiency can lead to health issues, emphasizing the importance of incorporating mineral-rich foods into daily meals for optimal nutrition. Functions of Minerals Maintaining the structure of various tissues and organs in the body. Enzyme activation Electrolyte balance Oxygen transport Nerve function Cellular communication Antioxidant defense Metabolic processes Immune system support Fluid balance Classification of Minerals 1. Iron It's a trace mineral that is an essential dietary mineral, meaning we need to get it from food and cannot produce it ourselves. Functio...