Preview

The Importance of Water in Biological Systems

Good Essays
Open Document
Open Document
729 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
The Importance of Water in Biological Systems
The importance of water in Biological Systems

Much of the Earths surface is comprised of water, as well as much of biological systems; for instance, the human body consists of approximately 70% of water, and in other biological organisms this figure could even be 95%. This largely relies on the bonding of water, whereby two hydrogen atoms bond to one oxygen atom; hydrogen bonding is the strongest intermolecular force due to its high polarity. Hence, what is the biological importance of water?
Water as a transport medium in plants
The properties of water make it an essential molecule to all forms of live; in plants, water serves a great importance of transporting nutrients, and it is its properties which allow it to be transported through a leaf. Due to its adhesive properties, water exhibits the phenomenon of capillary action in a plant, whereby water moves upwards through the xylem vessel of a plant, as the water molecules are attracted greatly to the inner walls of the xylem. The attraction of the water molecules to other compounds allows this to happen, thus, water is transported from the roots, through to the xylem vessel and then to the leaves of a plant. Moreover, the transport of nutrients also relies on water’s properties; the solvency of water allows nutrients to be transported throughout a plant. Dissolved nutrients in groundwater are absorbed through the plant’s roots, and delivered to different parts of the plant, in order for certain processes and functions to occur, such as for photosynthesis, reproduction or maintenance of the plants growth and health. Consequently, without the presence of water, certain functions and processes will not occur, or would be slowed down; hence, water is necessary in plants and serves a great importance.
Surface Tension

Water as a transport medium in Animals and Cells
Too add, water is also an excellent transport medium in animals; it is a major constituent of cells, as well as encompassing 90% of

You May Also Find These Documents Helpful

  • Good Essays

    Ap Biology Lab Report

    • 620 Words
    • 3 Pages

    In a flowering plant, the water travels from the soil, then to the root hairs, next to the xylem, then into the stomata, to the mesophyll cells, next to the stoma, then finally into the atmosphere. Osmosis is the diffusion of water through semipermeable membranes. Transpiration is the evaporation of water from the leaf. Cohesion is when water molecules stick together. Adhesion is when water molecules stick to, not attract. Root pressure is force made by root on water columns. Water potential is the negative pressure in leaves, which is positive in roots.…

    • 620 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Describe the pathway of water movement from xylem cells in the stem to the air surrounding the leaf.…

    • 493 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    The transport of water upward from roots to shoots in the xylem is governed by differences in water potential, with water molecules moving from an area of high water potential to an area of low water potential. The movement of water through a plant is facilitated by osmosis, root pressure, and the physical and chemical properties of water. Transpiration creates a lower osmotic potential in the leaf, and the TACT mechanism describes the forces that move water and dissolved nutrients up the xylem (AP Bio Big Idea 4).…

    • 1318 Words
    • 6 Pages
    Satisfactory Essays
  • Good Essays

    Water that enters the xylem in the roots is transported upwards through the stem to the leaves, which is a process also known as transpiration.…

    • 540 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Osmosis: Cell Wall and Water

    • 2770 Words
    • 12 Pages

    Aim: The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material.…

    • 2770 Words
    • 12 Pages
    Powerful Essays
  • Good Essays

    Water provide and the medium for transportation, acts as a solvent, participates in chemical reaction, provides lubrication and shock protection, and aids in temperature regulation in the human body.…

    • 927 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Water is one of the most important molecules necessary to life. humans, for example, are made up of 70% water.…

    • 500 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Water constitutes 50% to 70% of the human body. Its unique chemical properties enable it to dissolve substances as well as serve as medium for chemical reactions, temperature regulation and lubrication (found in the knees and other joints of the body); it also aids in regulating the acid base balance in the body. It helps remove waste from the body and is the basis for saliva, bile and amniotic fluid.…

    • 2190 Words
    • 9 Pages
    Good Essays
  • Good Essays

    Describe the pathways AND mechanisms by which water passes from the soil to the xylem vessels in the root. (7 marks)…

    • 461 Words
    • 2 Pages
    Good Essays
  • Good Essays

    The three main theories as to how xylem transports water and minerals are root pressure, capillary action, and cohesion-tension/transport pull. The root pressure theory works by the water being pumped into xylem tissue. Then, the minerals and ions absorbed with the water then get pumped up the root. The water then follows the ions and minerals up the xylem, and throughout the plant. Capillary action works by relying on the adhesive properties of water. Because the polarity of the capillary walls attracts water molecules, water sticks to the sides of the tube, therefore, causing the water to move up the tube. Cohesion-tension or transpiration pull works by the water from the leaves being evaporated caused by the heat of the sun. This then causes a change in pressure which moves the water up from the…

    • 2091 Words
    • 9 Pages
    Good Essays
  • Good Essays

    In digestion, all substances are broken down into smaller more soluble substance which can be carried by water in the blood and delivered to the parts of the body which require it; it acts as a transport medium. If blood was not made up largely of water then the required substances would not be transported to…

    • 872 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Water is the most abundant substance in living cells; approximately 60% to 80%. Water molecules are polar, it determines why ionic bonded molecules dissociate in water. Hydrolysis is when water breaks down larger molecules of food during digestion. Water is considered to be a universal solvent. Water is also important for the transport of materials like hormones and enzymes within the blood plasma. Water helps to stabilize body temperature because it absorbs and releases high levels of heat before its temperature changes. Water serves as a shock absorber and finally it is a base for all body lubricants in system,…

    • 471 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Transpiration Lab Report

    • 1078 Words
    • 5 Pages

    From the roots, water is transported with osmosis with a pressure pulling the water and minerals up towards the leaves. It is the transpirational pull moving it up with the help of cohesion and adhesion. Transpiration decreases the water potential causing water to move in and pull upward into the leaves and other areas of low water potential. Loss of water through transpiration can be facilitated by the opening and closing of the stomata depending on environmental condition. The rate of transpiration depends on several environmental factors such as light, humidity, temperature, and air movement, while the rate of evaporation depends on the water potential gradient, which is contributed by gravity, pressure, and solute concentration. The purpose of this experiment is to measure pressure changes on the different types of environmental factors that affect the rate of transpiration.…

    • 1078 Words
    • 5 Pages
    Good Essays
  • Good Essays

    The movement of water from roots to shoots is conducted via the xylem using mass flow. The force of cohesion - a force produced by the xylem, increases the attraction between the molecules which make up the water in the xylem. The xylem is composed of different kinds of cells; tracheids, vessels, fibres and unthickended xylem parenchyma. Both tracheids and vessels form pipes through which liquid can be moved, conducting water and supporting tissues. Fibres simply play a support role and parenchyma have a storage function. The xylem pipework in all living plants consists entirely of dead cells; composed of lignin rich tissues that once have reached maturity promptly die via a process known as apoptosis. This cell death creates a hollow tube leaving water to move rapidly, free of obstacles. Tracheids are long and thin with tapered end walls and a narrow lumen. Vessel elements however are broad, short and have wider lumen. These vessel elements are arranged in columns forming the vessels. Vessels are vital in rapid water transport from roots to shoots as little resistance to water flow is offered by their broad lumen. Pitted tracheids link with adjacent cells to form a series of pipes along the stem, these pipes increase the resistance of the pipe to the flow of water.…

    • 888 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Marijuana Plant Problems

    • 533 Words
    • 3 Pages

    Plants usually use the process of osmosis to take up the nutrients from the soil. Osmosis is a process which can be defined as, the movement of water molecules from a region of higher concentration to a region of lower concentration. In plants, this means that the water transfers from the soil to the drier…

    • 533 Words
    • 3 Pages
    Good Essays