Categories
LIVING THINGS

Classification of organisms


Why is classification of organisms important?

  • Living things are very different from each other-this is referred to as diversity among living things- Classification  of organism is an organized way to study   These diverse  organisms, and show how they are  related to each othe

Classification :  Is a system of grouping related organisms.

Grouping of organisms is based on:

1/Structural  similarities

2/ Biochemical and genetic  similarities.

3/ Stages of embryonic development similarities.

4/ fossil evidence.

Classification systems  agree that,

related organisms shared  a common ancestor. (evolutionary relationship).

Study the diagram below, that Shows  the  accepted  system of classification .

You can use this classification chart to figure out the scientific name!

Example: The human scientific name is??????????????? Homo sapiens. Try another organism!

For more information about the basis for classifying organisms refer to this link: Classifying organisms :)

Categories
LIVING THINGS

Human gastrointestinal tract ( the digestive system)


The human gastrointestinal tract is made up of the following parts:

the stomach and intestine,[1] sometimes including all the structures from the mouth to the anus.[2] (The “digestive system” is a broader term that includes other structures, including the accessory organs of digestion.

For detailed information check the  link below.(Wikipidea)

Click here for more information about the Gastrointestinal tract

The you tube video will provide a visual tool to enhance your understanding of this system.

[youtube http://www.

youtube.com/watching ?v=nM5kMSjBrmw&w=5

A final option is the power point presentation that outline the function  & structure of the digestive system.

The digestive system

 

 

Categories
LIVING THINGS

Scientific method #1


The scientific method is a set of steps that a scientist follow to solve a problem.

Essential elements of a scientific method are :

  • Define a problem ( a question to answer)
  • Hypothesis ( a possible answer to the problem
  • Experiments (test the hypothesis)
  • Collect,organize and interpret data.
  • Make a conclusion.

For more information check the next link.

Scientific method – Wikipedia, the free encyclopedia

Categories
LIVING THINGS

The Human Respiratory System



Without the respiratory system you would not be able to release the energy from the food you eat. And without energy you will not be able to do a thing, not even sleep!

So now, let’s take a tour inside the human respiratory system. Can you name some parts of the respiratory system? Well, in the  power point you will learn:

  • What is human respiration?
  • What are the organs that make up the respiratory system?
  • What are the functions of the parts of the respiratory system?
  • How can you explain the breathing process?
  • What are the different types of Respiratory System Disorders?
    Link used to embed content
          Click the link for the slide show
Link used to embed content
         
 You can learn more details at Wikipedia 
Categories
LIVING THINGS

The Immune System


Why do humans need an immune system? An immune system protects the body from invaders. It protects you against disease causing pathogens. By perfoming this job the immune system helps you to maintain a balanced internal environment. The power point attached below will outline the following information :

  1.  How does the immune system work to protect the body against diseases?
  2. What is the function of the immune system?
  3. What are the three line of defense?
  4. What causes an  immune reaction (response)?
  5. How does your body react to an antigen?
  6. Click this link below to view the ppt.
  7. Topic :The-immune-system (ppt)
  8. Click the link below to watch the video  about the immune sys.


http://www.bing.com/videos/se+arch?q=theimmune+system+processes&view=detail&mid=B0CEA01F75A5B5B466FCB0CEA01F75A5B5B466FC&fir

Categories
MAINTAINING HOMEOSTASIS

THE FEEDBACK MECHANISM


HI ALL, WE ARE GOING TO STUDY TOGETHER THE FEEDBACK MECHANISM, THE PROCESS THAT ALL LIVING THINGS USE TO KEEP A STABLE INTERNAL STATE. WITHOUT THIS PROCESS WE MIGHT GET SICK OR EVEN DIE. YOU WILL BE ABLE TO EXPLORE THIS PROCESS BY FOLLOWING the POWER POINT.

Topic: feedback mechanism (1)