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Hemostasis is the body’s natural way of stopping bleeding, and it’s a marvel of our physiological design. It’s most effective in dealing with injuries to small blood vessels like arterioles, capillaries, and venules, which are the usual culprits in everyday bleeding episodes. However, it’s ineffective when controlling bleeding from medium or large arteries.
Hemostasis: Formation of a Platelet Plug and Blood clotting Read More »
Introduction: Blood, often called the fluid connective tissue, plays a fundamental role in maintaining the body’s equilibrium. Comprising both plasma and blood corpuscles, this remarkable substance constitutes approximately 30-35 per cent of the extracellular fluid in our bodies. An average adult weighing 70 kilograms harbours around 5.5 litters of blood, a testament to its paramount
Introduction The plasma membrane, a fundamental element within the intricate machinery of living cells, is a dynamic and fluid-structure governing the exchange of substances between cells and their surroundings. This selective and permeable barrier plays a pivotal role in cellular function by regulating the influx and efflux of molecules. The revolutionary fluid mosaic model, conceived
The Plasma Membrane Read More »
Explore the intriguing Chemical Theory of the Origin of Life, a revolutionary concept proposing life’s gradual emergence through complex chemical reactions on early Earth. Delve into its essential components, stages of life’s emergence, and the pivotal experiments validating this theory. Discover how reducing atmospheres, crucial chemicals, energy sources, and vast time spans combined to shape the foundation of life
The Chemical Theory of the Origin of Life Read More »
The universe came into being around 15 billion years ago through a big bang, a thermonuclear explosion of a dense entity proposed by Abbe Lemaitre in his Big Bang Theory in 1931. Subsequently, our solar system formed about 4.5 to 5 billion years ago from a gaseous cloud called the solar nebula, as Kant-Laplace’s Nebular
Theories of the origin of life Read More »
Maintaining proper levels of water and electrolytes and removing nitrogenous waste are necessary for all animals to survive. Regulating water and electrolytes is known as osmoregulation, and eliminating nitrogenous waste is called excretion. These processes are closely related but have different names. Both of these processes contribute to homeostasis, which is essential for life. In vertebrates, the kidneys are responsible for both osmoregulation and excretion, while invertebrates have specialized organs for these functions.
Osmoregulation in Animals Read More »