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:
<span><span>- 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.
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- 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.
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- Most pathogens that enter the body together with food are usually stopped by stomach acid.
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- Normal flora, harmless bacteria that reside on the skin and many mucous membranes in the body, also help to protect the body.</span></span>
The cough and sneeze reflex can also help to remove pathogens.
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From all the terms mentioned above, only cellular plasma is an extracellular fluid.
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<span>He has violated the principle of freedom from coercion. When a subject is taking part in a survey or research, they must be doing so of their own will. Being tricked or coerced into participation is, with few exceptions, against many of the tenets of good Psych research: it will also likely give poor results that will have little practical effect in the larger world.</span>
Answer:
apices
Explanation:
The growth occurs by single apical cell in initial stages, But mature plants have several scattered apical cells on the margin so growth also takes place at many points..
