Describe how lymph nodes and organs help the immune system fight pathogens.

Biology

2 answers:

Andrew [12]2 years ago

5 0

white blood cells/lymphoctyes

lymph gets filtered by nodes and structures

germs collect in lymph nodes

I am Lyosha [343]2 years ago

4 0

The defense system of the human body is made up of entire organs and vessel systems like the lymph vessels, but also of individual cells and proteins. The inner and outer surfaces of the body are the first barriers against pathogens (germs). These surfaces include the skin and all mucous membranes, which form a kind of mechanical protective wall.

Several things support this protective wall:

- The body’s own antibacterial substances can disable different pathogens from the environment at an early stage. A certain enzyme found in saliva, the airways and tear fluid destroys the cell walls of bacteria.

- Many pathogens that are breathed in get stuck to mucus in the bronchi and are then moved out of the airways by hair-like structures called cilia.

- Most pathogens that enter the body together with food are usually stopped by stomach acid.

- Normal flora, harmless bacteria that reside on the skin and many mucous membranes in the body, also help to protect the body.

The cough and sneeze reflex can also help to remove pathogens.

Hope this helps (:

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<h3>How, explain your answer briefly?</h3>

In the two maps that show the allele frequency of sickle haemoglobin (HbS) and malaria endemicity in Africa, it can be seen that in the regions with no malarial outbreak or malaria-free areas coincide with the grey to lighter shades of red in the heat map of the allele frequency of HbS. The colour coding in the heat map for the allele frequency tells us that the frequencies range from 0 to 2.02 in the malaria-free areas.

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