In physiology, respiration is defined as the movement of oxygen from transport of respiratory gases pdf outside environment to the cells within tissues, and the transport of carbon dioxide in the opposite direction. Respiration could also be defined as the release of energy from glucose and this is achieved through the breaking down of this glucose in the cells.
Oxygen from the atmosphere is absolutely pivotal to this breaking down. Where oxygen is not present anaerobic respiration takes place. Energy alcohol is not released by anaerobic respiration in humans, instead in its place Lactic acid is released.
Although physiologic respiration is necessary to sustain cellular respiration and thus life in animals, the processes are distinct: cellular respiration takes place in individual cells of the organism, while physiologic respiration concerns the diffusion and transport of metabolites between the organism and the external environment. In animals with lungs, physiological respiration involves respiratory cycles of inhaled and exhaled breaths.
The contraction of the diaphragm muscle cause a pressure variation, which is equal to the pressures caused by elastic, resistive and inertial components of the respiratory system. Physiological respiration involves the mechanisms that ensure that the composition of the functional residual capacity is kept constant, and equilibrates with the gases dissolved in the pulmonary capillary blood, and thus throughout the body. This section is in a list format that may be better presented using prose.
You can help by converting this section to prose, if appropriate. Nelsons VCE Units 1-2 Physical Education.