What is Blood Introduction Blood is an essential component of the human body and plays an important role in maintaining normal body functions. It circulates continuously through the heart and blood vessels, transporting oxygen, nutrients, hormones and other substances to different parts of the body. At the same time, it carries carbon dioxide and metabolic wastes to organs such as the lungs and kidneys for removal. From a biological perspective, blood is a specialised connective tissue consisting of a liquid component called plasma and formed elements, which include red blood cells (RBCs), white blood cells (WBCs), and platelets. Each component has a specific structure and function and together they help maintain the body's internal balance, known as homeostasis. What Is Blood Blood is a fluid connective tissue that circulates through the heart and blood vessels. In a healthy adult, the total blood volume is generally around 4–6 litres, although it varies according to body size and...

Hormones Introduction Hormones are chemical substances produced by special cells or glands in our body. They travel through the blood or act on nearby cells and tissues to control and coordinate many important activities. They act as messengers and carry signals to different parts of the body. Hormones help control many important functions such as growth, development, metabolism, digestion, reproduction, sleep, mood,  blood pressure, blood sugar, water balance and responses to stress. They are released into the blood and help different organs work properly and maintain balance in the body. The organs that produce and release hormones are called endocrine glands. Together, these glands form the endocrine system. Examples of important endocrine glands include the pituitary gland, thyroid gland, adrenal glands, pancreas, ovaries, testes, pineal gland, parathyroid glands, hypothalamus, and thymus. What Are Hormones A hormone is a chemical substance produced by specialized cells a...

WHAT IS OSMOSIS OSMOSIS Osmosis is an important biological process through which water moves from a region of higher water concentration to a region of lower water concentration through a selectively permeable membrane. It is a special type of diffusion that involves only water molecules. Osmosis plays a major role in the survival and functioning of plants and animals. How Does Osmosis Occur? For osmosis to take place, three things are generally required: Water or a solvent – Water is the most common solvent involved in osmosis. Different concentrations of water – There should be a difference in the concentration of water on the two sides. Selectively permeable membrane – The membrane should allow water molecules to pass through but restrict or control the movement of many dissolved substances. Water naturally moves through the membrane from the side where water is more concentrated to the side where water is less concentrated. This movement continues until the difference in wate...