Lymphatic System Part II by MUM

What are the 2 parts of the Immune System?

• Endocrine Defense System

• Innate Defense Mechanisms

• Accelerated Defense System

• Adaptive Defense Mechanisms

What makes up the FIRST line of INNATE defense?

• skin

• mucous membranes

• secretions

• antibacterial cells

What is the 2nd line of INNATE defense?

• phagocytic cells

• natural killer cells

• proteins and inflammatory systems

• fever

What is TRUE about ADAPTIVE defense mechanisms

• known as the 3rd line of defense

• includes lymphocytes and antibodies

• also includes macrophages

• also includes a 4th line of defense

What is immunity defined as?

• the ability to avoid bacteria

• the resistance to disease

An effective immune system does what?

• protects us from most bacteria

• protects us from most viruses

• keeps us healthy all the time

• protects us from transplanted organs/grafts, and even our own cells that have “turned against us” (cancer cells)

What is the science definition of "innate defense system" ?

• the mechanical barriers that cover body surfaces

• the defenses that are the same as adaptive defenses

• also includes the the cells and chemicals that act on the initial battlefronts to protect the body from invading pathogens

• a voluntary system of defense

What are the surface membrane barriers?

• skin

• mucous membranes

• saliva

• gastric juices

How is skin a defense mechanism?

• As long as the skin is clean, it is a good defense

• The only good defense skin provides is when it is pierced

• As long as the skin is unbroken, it is an excellent barrier against invading microorganisms

• The surface of the skin is slightly acidic and also contains sebum (oil) that can kill bacteria

What is true about these Membrane Barriers

• Gastric juice in the stomach kills most harmful bacteria that hitch a ride on food

• Tonsil stones indicate too much sugar is being ingested

• Mucus traps microorganisms that enter passageways

• Saliva contains enzymes that destroys bacteria