explain respiration in bacteria...
Answers
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on the basis of mode of respiration the bacteria are divided into two main groups that is aerobes and anaerobes each group is father of two types that is strict obligate and facultative
a)obligate or strict aerobes- this bacteria can leave only in presence of oxygen as they possess the enzyme system for aerobic respiration only in the absence of oxygen they cannot respire and die example bacillus and subtilis
b)facultative anaerobes- they normally respire aerobically however they are capable of switching over to anaerobic mode to get energy for their survival if sufficient oxygen to sustain aerobic respiration is not available in the environment example psudomonas
c) obligate or strict anaerobes- these bacteria respire anaerobic early only the growth of such bacteria will certainly be slower as anaerobic respiration liberates much less amount of energy as compared to aerobic respiration they like enzymes necessary for carrying out aerobic respiration example clostridium botulinum
d) facultative aerobes- they normally respire anaerobically but are capable of respiring aerobically as well if oxygen is available most of photosynthetic bacteria are facultative aerobes example photosynthetic bacteria chlorobium
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The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs called alveoli in mammals and reptiles, but atria in birds. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood.
These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles. In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.