A2 the reason The ubiquitous enemy
A2 the reason—— The ubiquitous enemy
Infectious microbes and larger organisms such as worms are present in our environment. They range from being helpful (e.g. E coli to being major pathogens which can be fatal(eg.HIⅤ
Infectious microbes and larger organisms such as worms are present in our environment. They range from being helpful (e.g. E. coli) to being major pathogens which can be fatal (e.g. HIV)
The ubiquitous enemy Microbes are able to survive on animal and plant products by releasing digestive enzymes directly and absorbing the food, and/or by growth on living tissues(extracellular),in which case they are simply bathed in nutrients. Other microbes infect(invade)animal/human cells (intracellular), where they not only survive, but also replicate, in this case utilizing host-cell energy sources. Both extracellular and ntracellular microbes can grow reproduce and infect other individuals
Microbes are able to survive on animal and plant products by releasing digestive enzymes directly and absorbing the food, and/or by growth on living tissues (extracellular), in which case they are simply bathed in nutrients. Other microbes infect (invade) animal/human cells (intracellular), where they not only survive, but also replicate, in this case utilizing host-cell energy sources. Both extracellular and intracellular microbes can grow, reproduce and infect other individuals. The ubiquitous enemy
There are many different species of microbes and larger organisms(such as worms) which invade humans, some of which are relatively harmless and some even helpful (e g E coli in our intestines). Many others cause disease human pathogens), and there is a constant battle between invading microbes and the immune system Some microbes can even cause the death of their hosts lthough this should not be the property of the most successful microbes. Table i shows the range of organisms hat can infect humans
There are many different species of microbes and larger organisms (such as worms) which invade humans, some of which are relatively harmless and some even helpful (e.g.E. coli in our intestines). Many others cause disease (human pathogens), and there is a constant battle between invading microbes and the immune system . Some microbes can even cause the death of their hosts, although this should not be the property of the most successful microbes. Table 1 shows the range of organisms that can infect humans