Water is a vital ingredient for all living things, and the mechanisms that keep fluid and electrolyte balance in humans are well recognized. Depending on lean body mass, water makes about 50-80% of total body weight. Men, on average, have more lean body mass and a larger percentage of body mass made up of water than women. With ageing, both men’s and women’s proportionate water mass falls.
Healthy adults maintain a precise water balance, although newborn infants and the elderly are more susceptible to dehydration. Dehydration can cause verbal incoherence, extremities weakness, ocular globe hypotonia, orthostatic hypotension, and tachycardia, among other symptoms.
The maintenance of health and life requires the management of water balance. Water is the only liquid nutrient that is truly important for bodily hydration, thus a sedentary adult should drink 1.5 litres per day on average.
Nutrients: are substances that are required for plant development, particularly nitrogen and phosphorus. When we fertilize our gardens and fields, we provide nutrients, and adding nutrients to water fertilizes water-dwelling plants in the same manner. Nutrients are frequently found in relatively low amounts compared to plant requirements. Throughout the year, nutrient levels fluctuate as growing plants absorb nutrients and dying plants release them back into the water.
These nutrients are separated into two groups:
- Macronutrients are nutrients that the body needs in big proportions.
- Micronutrients are little quantities of nutrients that the body need.
The nutrients listed above might be derived from the natural environment.
Macronutrients offer energy to a living creature for the metabolic system to function properly. They provide a lot of energy when it’s transformed into usable energy. Macronutrients include fats, proteins, and carbohydrates.
Micronutrients are required for metabolism to work properly. To govern the body’s processes, they also construct and repair damaged tissues. Micronutrients include calcium, iron, vitamins, minerals, and vitamin C.
EXAMPLES OF VARIOUS IMPORTANT NUTRIENTS IN FOOD:
Carbohydrates: It is one of humanity’s primary sources of energy. Fibre, sugar, and starch are the three forms of carbohydrates found in them. They are often low in calories, which aids in the maintenance of a healthy diet.
Calcium: It is a mineral that is necessary for the formation of healthy bones and teeth. Our brains, muscles, and hearts all require extremely little quantities of it. Pudding, milk, yoghurt, tofu, tinned salmon, and fresh leafy green vegetables are all good sources of calcium. Osteoporosis is a disease caused by a shortage of calcium in the body.
Iron: It’s a substance found in our red blood cells. It carries oxygen from our lungs to our organs, muscles, and cells. Spinach, soybeans, and other green vegetables are good providers of nutrition.
Cholesterol: It is necessary for the development of the brain, nerves, and cells. It is necessary for the formation of enzymes and hormones. Cheese, milk, poultry, meat, and fish are some of the foods available.
Fats: It’s one of the most essential calorie sources. A gramme of fat has 9 calories in it. Carbohydrates and proteins provide nearly twice as many calories. Fat is commonly present in meals used in cooking, such as spreads on bread, as well as snacks and pastries.
Sodium: Sodium is found in foods such as milk and fresh vegetables. High blood pressure can be caused by a lack of salt.
Functions of Nutrients:
Nutrients serve a variety of critical purposes, including:
- They are the main source of energy for the human body.
- They help in the growth and repair of body tissues.
- Fat-soluble vitamins are better absorbed.
- Collagen production is aided by this supplement.
- Blood veins, bones, and ligaments are given the correct structure.
- They also aid in maintaining the body’s equilibrium.
HOW ARE WATER AND MINERALS TRANSPORTED IN PLANTS?
The process of delivering water and critical nutrients to all parts of the plant for it to survive is known as transportation.
To transport water and nutrients, plants need two types of conducting tissues:
- Xylem
- Phloem
XYLEM:
Minerals and water are transferred from the soil to the leaves via xylem cells in plants. Mineral salts in the soil are absorbed by plants through their roots and then translocated upwards with water through the xylem. The stem, roots, and leaves all have linked xylem cells that form a conducting channel that reaches all plant components. Ions are obtained by root cells from the soil, resulting in a differential ion concentration between the roots and the soil. Therefore, according to the result, it can be concluded that water flows continuously into the xylem.
OSMOSIS
Osmosis creates osmotic pressure, which allows water and minerals to move from one cell to another. Transpiration results in a constant loss of water as well as a suction pressure caused by water being driven into the xylem cells of the roots.
TRANSPORTATION FROM ROOTS
Water is distributed throughout the plant through the roots. The technique for transportation is as follows:
- The plants continually absorb water through their roots. The stem provides water to all parts of the plant, along with the leaves.
- Only a little quantity of water is retained or used by the plant in photosynthesis. The rest evaporates as water vapour into the sky via the Stomata found in the epidermis of the leaves and other aerial portions of the plant.
- This causes suction pressure, which pushes water up from the roots’ xylem to the stem, and finally to the leaves.
- • As the strain increases, the diameter of the xylem tissues in the form of capillary tubes narrows (tracheids and fibres).
- Water from underneath ascends by a capillary force into the xylem vessels when they are vacant, as they are when water is lost through transpiration.
As a result, the xylem may be considered to play a significant role in the movement of water and minerals once they have been absorbed and transported to other plant sections.
PHLOEM
The phloem is crucial for transporting nutrients and sugars such as carbohydrates generated by the leaves to metabolically active parts of the plant. It consists of live cells. Sieve plates are tiny pores in the cell walls that develop at the ends of the cells.
CONCLUSION
In the human body, water plays a variety of purposes. It serves as a construction material, a solvent, a reaction medium, a reactant, a transporter for nutrients and waste products, a thermoregulator, and a lubricant and shock absorber. Water balance is quite exact, as a loss of 1% of bodily water is generally repaired within 24 hours. To achieve water balance, both water intake and water losses are regulated.