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

Compare and Contrast the Transport System of a Mammal and a Plant

Extracts from this document...

Introduction

Compare and Contrast the Transport System of a Mammal and a Plant Introduction: Both mammals and plants require a transport system to satisfy the requirements of rapid supply of nutrients & gases, as well as the removal of waste products. Due to their huge surface area, transportation of substance is not quick enough if rely solely on diffusion, therefore a transport system is needed. A transport system relies on the mass flow movement of fluids due to pressure difference. The Mammalian Transport System: Mammals are metabolically active and have high nutrients demand, therefore a cardiovascular system is used to satisfy the need. This consists of a four-chambered heart and a system of interconnecting tubes (i.e. blood vessels) where blood is moved through them to the rest of the body. Mammal has a closed double circulatory system, which consists of pulmonary circulation going to the lungs and systemic circulation going to the rest of the body. With two circuits, a higher pressure blood can be achieved going to the body to form tissue fluid and deliver respiratory gases more quickly. ...read more.

Middle

It also contains elastic fibres to prevent the vessel from bursting. The capillary takes oxygenated blood as close as possible to all cells for rapid transfer of substances. It is one cell thick (endothelial cell) to minimize diffusion distance with its diameter about the same size as a red blood cell. There are gaps in the endothelium layer to allow substance to seep back into the blood. The vein brings deoxygenated blood (or oxygenated for pulmonary vein) back to the heart. Since blood in vein does not have a high pressure, less muscle and elastics are required, it also has a thin wall. Semilunar valves are present to prevent backflow of the blood. Vessels in a Plant: There are two main types of vessels in a plant transport system, known as xylem and phloem. Like vessels in mammals, xylem and phloem are both complex tissues containing more than one cell type. However, the cell types are different compared to mammals. Xylem has the dual functions of support and transport of water & mineral ions. Vessel elements in the xylem are involved with the transport of water. ...read more.

Conclusion

When the right atrium contracts, blood are pushed into the right ventricle. This is atrial systole, with tricuspid valves opening to allow blood flow. Valves in vena cava also close to prevent back flow. During ventricular systole, the right ventricle contracts which forces blood into the pulmonary artery. This pressure pushes open the semi-lunar valves while heart tendons prevent the tricuspid from opening to stop blood backflow into the atrium. Deoxygenated blood then collects blood from the lungs and return to the left side of the heart via the pulmonary vein, where heart undergoes diastole for blood to fill chamber, opening of bicuspid during atrial systole and blood pushes around to the body during ventricular systole through the aorta. In a cardiac cycle, the sinoatrial node, which is patch of muscle in wall with innate rhythm, sends impulse to atria which contracts (atrial systole). Non-conducting tissue between atria and ventricles and the atrio-ventricular node delay impulses for a short period of time to ensure atria and ventricles do not contract at the same time. Signal then is sent by the AVN through the Bundle of His to the Purkyne tissue, which brings contraction to ventricular wall. ?? ?? ?? ?? Adrian Tam ...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

Here's what a teacher thought of this essay

3 star(s)

***
A reasonably good comparison of transport systems in mammals and plants. However, greater attention to detail and more complete explanations of terms would improve the quality. There are a few factual errors.

Marked by teacher Adam Roberts 05/09/2013

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)

    These can be tested for, by adding Benedict's reagent to the sugar and heating in a water bath. If a reducing sugar is present, the solution turns green, then yellow and finally produces a brick red precipitate.

  2. Marked by a teacher

    The Effect Of Temperature On The Permeability Of The Cell Membrane

    3 star(s)

    skin if used incorrectly, however the position of the first aid kit was known in case of an emergency, an apron was used to protect the clothes from the red pigment anthocyanin which stains clothes Control Experiment A control experiment is required to ensure that nothing else apart from the independent variable will affect the results.

  1. Marked by a teacher

    Investigating osmosis in plant tissue.

    3 star(s)

    We will then put three measured cylinders into six jar specimen bottles and add sucrose solution into each jar (jar one was 0M-distilled water ranging to jar six-1M sucrose solution) we will then weigh each piece of potatoe every 15 minutes for an hour, cleaning each piece of potatoe.

  2. Osmosis in Potato cells

    Volume of the solution. Each volume needs to be constant to ensure that the exact amount of water can be determined and also for the reason that even with the same amount of sugar solution, a different volume of water added will change the results.

  1. Effects of exercise on cardiovascular system

    Results for each subject will be recorded separately. Method: Subject A is 32 years old male, former smoker, with no history of lung or heart disease, in relatively good physical condition. Subject B is 29 years old male, healthy non-smoker, in a good physical condition.

  2. The Effect of Different Substrates on the Rate of Respiration on Yeast (Saccharomyces cerevisiae).

    Sucrose is hydrolysed` (inverted) into glucose and fructose by invertase present on the cell surface of regular bakers' yeast. Lactose (milk sugar) is not fermented by regular bakers' yeast. This is the only variable that is being manipulated Conclusions and Predictions Having studied the theory on yeast, the substrates, and

  1. Homeostasis In Mammals.

    Osmoregulation is controlled by the hypothalamus (found in the brain, otherwise known as the purity gland) sensitive to the level of water in the blood, if this is to fall too low the hormone ADH (anti diuretic hormone) is released into the blood, once this hormone has reaches the kidney,

  2. P6Explain how these dietary nutrients are processed through the digestive system

    Glucose is used in the body as a source of fuel. These carbohydrate molecules are broken down into smaller molecules by enzymes in the saliva. The carbohydrates firstly enter and are broken down by enzymes and the saliva and the pancreas.

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