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Respiration Respiration Presentation Transcript

  • Respiration Click to edit Master subtitle style
  • Respiration Respiration is the process by which foodis burnt in the cells of the body with thehelp of oxygen to release energy. It takesplace in the mitochondria of the cells.Click to edit Master subtitleinvolvesRespiration style the exchange ofgases and oxidation of food in thepresence of air to release energy.Inhalation and exhalation of air occurdue to change in air pressure in lungs.Diffusion helps in exchange of gases in
  • Types of respiration There are two main types of respiration. They are aerobic andanaerobic respiration.i) Aerobic respiration :- Takes place in the presence of oxygen.It produces more energy. The end products are carbon dioxide,water and energy. It takes place in most organisms. In aerobicrespiration glucose is converted into pyruvate in the cytoplasmin the presence of oxygen and then in the presence of oxygen,pyruvate is converted into carbon dioxide, water and energy inthe mitochondria.ii) Anaerobic respiration :- takes place in the absence of oxygen.It produces less energy. The end products are lactic acid orethanol, carbon dioxide, and energy. It takes place in musclecells and yeast. In anaerobic respiration in muscle cells, glucoseis converted into pyruvate and in the absence of oxygenpyruvate is converted into lactic acid and energy. In anaerobicrespiration in yeast, glucose is converted into pyruvate and in
  • Respiration in humans The main organs of the respiratory system arenostrils, nasal cavity, pharynx, larynx, trachea,bronchi, bronchioles, lungs and diaphragm. Air enterthrough the nostrils. The hairs and mucous traps thedust particles. It then passes through the pharynx,larynx, trachea, bronchi and enters the lungs. Thetrachea has rings of cartilage which prevents it fromcollapsing when there is no air in the trachea. Thebronchi divides into smaller tubes called bronchioleswhich ends in tiny air sacs called alveoli. The alveoliis supplied with blood vessels through which
  • Click to edit Master subtitle style
  • Mechanism of breathing• Breathing is a continuous process that involves both inhalation and exhalation. The process of taking in oxygen-rich air is known as inhalation, while the process of releasing carbon dioxide-rich air into the atmosphere is known as exhalation. During inhalation, the diaphragm moves down and the ribs move upwards and outwards, thereby increasing the space in the chest cavity. This leads to the movement of air inside the lungs.• During exhalation, the diaphragm moves to its former position and the ribs move downwards and inwards, thereby reducing the size of the chest
  • Prepared byNiyatichampanera Class :- X