Microbes And Natural Barriers In Your Body

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Information about Microbes And Natural Barriers In Your Body
Education

Published on February 3, 2009

Author: Sciencetutors

Source: slideshare.net

Description

To learn how natural barriers function to protect your body from infection
To learn how special cells in blood form part of the defence or immune system of your body.

MICROBES & NATURAL BARRIERS IN YOUR BODY www.sciencetutors.zoomshare.com

NATURAL BARRIERS Would you be worried if you find out that someone in the class had a particular infectious disease, e.g. chicken pox or flu. I will be worried: Hands up I can’t be bothered : Hands down www.sciencetutors.zoomshare.com

I will be worried: Hands up Explain Why you will be worried. Would you be worried if you find out that someone in the class had a particular infectious disease, e.g. chicken pox or flu. www.sciencetutors.zoomshare.com

I can’t be bothered : Explain why you can’t be bothered www.sciencetutors.zoomshare.com

NATURAL BARRIERS Read Learning Objectives and make notes of keywords or phrases Objectives To learn how natural barriers function to protect your body from infection To learn how special cells in blood form part of the defence or immune system of your body. www.sciencetutors.zoomshare.com

Read Learning Objectives and make notes of keywords or phrases

Objectives

To learn how natural barriers function to protect your body from infection

To learn how special cells in blood form part of the defence or immune system of your body.

Outcomes L recognise the skin, chemical in tears and sweat as part of your body's natural barrier to infection I State how the white blood cells acts as a defence mechanism for the body. eg engulfing bacteria. H . State specifically that white blood cells produce antibodies in response to microbes invading the body www.sciencetutors.zoomshare.com

L recognise the skin, chemical in tears and sweat as part of your body's natural barrier to infection

I State how the white blood cells acts as a defence mechanism for the body. eg engulfing bacteria.

H . State specifically that white blood cells produce antibodies in response to microbes invading the body

NATURAL BARRIERS Read Learning Objectives and make notes of keywords or phrases Objectives To learn how natural barriers function to protect your body from infection To learn how special cells in blood form part of the defence or immune system of your body. www.sciencetutors.zoomshare.com

Read Learning Objectives and make notes of keywords or phrases

Objectives

To learn how natural barriers function to protect your body from infection

To learn how special cells in blood form part of the defence or immune system of your body.

Brainstorm Keywords Introduce the keywords/phrases to the class Defence Infection Immunity Barriers Antibodies Special Blood cells www.sciencetutors.zoomshare.com

Introduce the keywords/phrases to the class

Defence

Infection

Immunity

Barriers

Antibodies

Special Blood cells

IMMUNITY Immunity is the body's capability to repel foreign substances and cells. Two Types of Immunity Nonspecific Immunity Specific Immunity You MUST know types of Immunity www.sciencetutors.zoomshare.com

Immunity is the body's capability to repel foreign substances and cells.

Two Types of Immunity

Nonspecific Immunity

Specific Immunity

You MUST know types of Immunity

Nonspecific Immunity The nonspecific responses are the first line of defense our body’s have against microbes. Nonspecific responses block the entry and spread of disease-causing agents example bacteria or fungus or virus. Some very familiar examples of nonspecific response are..... www.sciencetutors.zoomshare.com

Nonspecific Immunity YOU MUST KNOW THAT Physical barriers in your body are the first line of defense. Our skin secrete chemicals that retard the growth of bacteria. Mucus line all body cavities which open to the outside e.g. respiratory, digestive, urinary, and reproductive tracts. Mucus produce enzymes that breakdown/destroy bacteria cell walls. www.sciencetutors.zoomshare.com

Our skin secrete chemicals that retard the growth of bacteria.

Mucus line all body cavities which open to the outside e.g. respiratory, digestive, urinary, and reproductive tracts. Mucus produce enzymes that breakdown/destroy bacteria cell walls.

NATURAL BARRIERS IN YOUR BODY Indicate in the boxes if parts shown are specific or nonspecific?

SPECIFIC IMMUNITY Highly specific responses or immunity are the second line of defense in your body and are tailored to an individual threat or tailored to carry out attack on microbes in specific ways. YOU MUST KNOW THAT Chemical barriers in your body are the second line of defense. www.sciencetutors.zoomshare.com

FIGHTING INFECTION Show Animation IB2.3 Fighting infection: round two to illustrate antibody production. http:// 192.168.4.3/groups/science/science/b2/resources/anims/IB2.3.htm The white Blood Cells (also known as WBC) are continually on the lookout for signs of disease. Ways by which they attack Some will produce chemicals called antibodies that will overpower the bacteria. OR They surround or engulf bacteria and kill them. www.sciencetutors.zoomshare.com

Show Animation IB2.3 Fighting infection: round two to illustrate antibody production.

The white Blood Cells (also known as WBC) are continually on the lookout for signs of disease.

Ways by which they attack

Some will produce chemicals called antibodies that will overpower the bacteria. OR

They surround or engulf bacteria and kill them.

NATURAL BARRIERS A = Eye B = Nose C = Oesophagus D = Stomach 2. Parts that stops microbes entering the body – Eyes, Nose, Skin, Oesophagus, Platelets 3. Parts of that kills try to kill microbes – E, F, D 4. Part B is gut sticky mucus to trap bacteria. Part D is acidic 5. Scabs are formed quickly over your cut to stop infection or bacteria getting into your body www.sciencetutors.zoomshare.com

A = Eye

B = Nose

C = Oesophagus

D = Stomach

2. Parts that stops microbes entering the body – Eyes, Nose, Skin, Oesophagus, Platelets

3. Parts of that kills try to kill microbes – E, F, D

4. Part B is gut sticky mucus to trap bacteria. Part D is acidic

5. Scabs are formed quickly over your cut to stop infection or bacteria getting into your body

LESSON REVIEW Q How do humans prevent disease? How do we fight diseases? How do we prevent the spread of diseases? http://www.quia.com/rr/418209.html www.sciencetutors.zoomshare.com

Q How do humans prevent disease?

How do we fight diseases?

How do we prevent the spread of diseases?

http://www.quia.com/rr/418209.html

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