Part of The Student Room Group

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

Blood structure and function in the body.

Extracts from this document...

Introduction

Blood Blood can be defined as: the circulating fluid (plasma) and suspended formed elements, such as red blood cells, white blood cells and platelets in the vascular system of humans and other vertebrates. This essay will mention about structure of the blood and the functions of the blood. Structure of blood has four major parts these are: plasma, red blood cells, white blood cells, and platelets. Plasma is mainly made up from water; nearly %90-%92 is water. This is a straw coloured fluid. ...read more.

Middle

They only exist for 120 days in body and there are approximately 4.5 - 5.8 million erythrocytes per micro-litre of healthy blood. This quantity depends on gender and age. White blood cells also named as leucocytes. There are different types of leucocytes. These can be defined as; granular and agranural. Depending on their types, they sometimes exist for few hours to few days but sometimes they can exist for many years. Platelets also called as trombocytes. These are granular and disk-shaped cell fragments. ...read more.

Conclusion

Blood also carries nutrients for our body cells. There are too many reactions happen in our body with the help of enzymes and these enzymes need optimum conditions to work well. One of these optimum conditions is: pH and pH is controlled by blood. Toxins are harmful for our body when the blood takes waste products from our cells than it goes to kidney. Kidney filters the blood and the toxins that filtrated from the blood are removed from the body in the form of urine. Blood plays a very important role in our body. It has very important functions and specialized structure to do them. Blood have a vital job in our body, without blood we could not exist. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Exchange, Transport & Reproduction section.

Found what you're looking for?

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

or


Here's what a teacher thought of this essay


None

Marked by teacher kerry jackson 19/02/2012

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 AS and A Level Exchange, Transport & Reproduction essays

  1. Marked by a teacher

    Describe the molecular structure of starch (amylase), glycogen and cellulose, and relate these structures ...

    4 star(s)

    and the formation of a 1,4-glycosidic bond. Depending on the monosaccharides used, this can be an ?-1,4-glycosidic bond or a ß-1,4-glycosidic bond. The reaction involves the formation of a molecule of water (H2O). This diagram shows two molecules of ?

  2. Marked by a teacher

    Human Reproductive System

    4 star(s)

    Seminal vesicle The seminal vesicles are sac-like pouches that attach to the vas deferens near the base of the bladder. They produce fructose that provides sperm with a source of energy and helps with the sperms' motility. The fluid of the seminal vesicles makes up most of the volume of a male's ejaculatory fluid.

  1. Marked by a teacher

    The Effect Of Temperature On The Permeability Of The Cell Membrane

    3 star(s)

    This is used to place the beetroots on in order to cut them in the accurate length .I will be using a while tile to place my beetroot onto, Why? The reason why I am using a white tile instead of black or any other is because using a white is easier to see.] * Colour Emitter- [What?

  2. Marked by a teacher

    What is Type 1 diabetes

    3 star(s)

    Sweets are no longer off limits. Once the child gets to know how their body responds to eating and taking insulin, eating sweets is possible as long as it's accompanied by a larger dose of insulin. Physical activity Physical activity should be an important part of a diabetic child's day.

  1. Effects of exercise on cardiovascular system

    Nerve receptors in blood vessels and muscles signal the central nervous system consisting of brain and spinal cord to release hormones such as adrenaline and noradrenalin into the blood stream which increases the heart pressure. As blood pressure increases this speed up the time in which blood is transported round the body.

  2. Function of the Golgi Body.

    There are two types: * Stratified - this is the toughest and thicker tissue, it forms the epidermis of the skin, where its function is protection. (6) * Transitional - this is a modified type of stratified epithelium. It consists of three to four layers of cells all of a

  1. AS biology coursework on enzymes

    I will need to time how long it takes for the cross to disappear on the white tile, but also monitor the colour of the solution and compare it to my control. Once the colour is the same or near about the same than I can stop the stopwatch and record my results.

  2. The Endocrine System

    The pineal gland is an extremely small gland found in the roof of the forebrain. 2. The endocrine system is the body's control system composed of glands that maintain a stable internal environment by producing chemical regulatory substances called hormones.

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