• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The Biological Significance of Water.

Extracts from this document...


Introduction Water is the basis of life, without it life would not have started and would not exist. There are so many reasons for which water is of paramount importance in biology. Water is vital for many processes that are essential for life; it acts as a solvent and as a medium for living organisms. Water is essential for all organisms because it acts as a solvent and medium in diffusion, a reagent for hydrolysis. It is a support for aquatic organisms; life was first created in the sea so this is very important. Importance in all organisms Water is important in temperature regulation in most organisms. It has a high specific heat capacity so it requires a lot of energy to increase its temperature and it retains heat relatively well. This is so that the body temperature does not vary that much; this also means that the temperature of water that aquatic organisms live in will stay at a suitable level. ...read more.


Importance in plants Water is essential in osmosis, as it requires the movement of water from a region of lower concentration to a region of lower concentration of water molecules. The weak hydrogen bonds mean that the water molecules can move relatively easily. One of the reasons that this is important is for water to enter cells by osmosis causing the cytoplasm and that it is needed for turgidity of cells to support the plant. The cohesive forces between water molecules mean that it is not easily compressed so it is a great medium for support. Water is required (it is the reagent) in the photosynthesis reaction, which is also essential as it is the way it produced energy needed to live. Hydroskeletons are a type of skeleton found in many soft-bodied invertebrates, which consists of water-filled body cavities controlled by muscles. Hydroskeletons are found in echinoderms (starfish, sea urchins), annelids (earthworms), nematodes, and a number of other wormlike invertebrate phyla. ...read more.


Tears contain water, which is protection against bacteria by killing it and as does mucus by trapping it. Water can help in lubrication in: - Mucus: lubricates passage of food, colon - easy passage for faeces, penis and vagina during intercourse, used externally in some animals such as snails and earthworms to aid movement - Synovial fluid: lubricates vertebrate joints - Pleural fluid: minimizes friction between lungs and ribs during breathing - Perivisceral fluid: lubricates movement of internal organs, e.g. in peristalsis - Pericardial fluid: lubricates movement in heart Water is in amniotic fluid, which protects and supports the fetus of mammals. Water is important in secretions, most secretions include substances in aqueous solutions such as tears, digestive juices and snake venoms. The humours of the eye, both aqueous and vitreous are made up of mostly water; it helps maintain the shape of the eye because it is not easily compressed which makes it useful in supporting. Winston Wong ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Poikilohydry in mosses: an ecological limitation or opportunity?

    In this regard mosses are essentially amphibious in nature, i.e. they require uninterrupted access to water for reproductive success 3,8. As a result mosses may typically be found 'hugging' wet soil, or living in permanently moist habitats, avoiding exposure to turbulent drier air found above the land surface 3,8.

  2. The Aral Sea Disaster

    it place and bring back all the fish and the sea level and area and volume to increase But wouldn't this take time? Yes but if we didn't get in this situation we would never have to deal with this but I believe that we have to do what ever

  1. Temperature regulation in mammals & birds.

    variable that should be controlled could be varying - affecting the results as they should not be. The temperature of the water at the beginning and end of the experiment must be kept controlled for all readings taken, as should the movement of the test tubes.

  2. Investigation in to the effect of bile salts on the digestion of fat.

    2% of Bile = 20 cm3 of milk = 10cm3 of sodium carbonate solution = 3 cm3 of distilled water = 2 cm3 of bile salts = 5 cm3 of lipase For 3% of Bile = 20 cm3 of milk = 10cm3 of sodium carbonate solution = 2 cm3 of

  1. What is the biological significance of water?

    Dissolve Ammonia gas in water and the result is a powerful base, Ammonium Hydroxide. Dissolve Hydrogen Chloride gas in water and the result is a powerful acid, Hydrochloric Acid. These are but two of many examples of water combining with another compound to create a new substance.

  2. The Biological Significance Of Water.

    This is different from liquids where the molecules are closer together. Because water is a liquid at room temperature it is suitable for the chemistry of life e.g. most enzymes, especially those in animals have an optimum temperature of between 30?C and 50?C.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work