|ELASTIC RECOIL OF LUNGS| |ALVEOLAR PRESSURE| |PLEURAL PRESSURE| |PHYSIOLOGY| |RESPIRATORY SYSTEM|

Elastic Recoil of Lungs:
This refers to the natural tendency of the lungs to recoil or return to their original shape and size after being stretched during inhalation. It is due to the elastic fibers in the lung tissue and the surface tension of the alveoli. Elastic recoil plays a crucial role in expiration (exhalation) by helping to push air out of the lungs.
Alveolar Pressure:
Alveolar pressure is the pressure of the air inside the alveoli (tiny air sacs in the lungs) during breathing. It fluctuates during the breathing cycle: it decreases below atmospheric pressure during inhalation to allow air to flow into the lungs, and it increases above atmospheric pressure during exhalation to expel air from the lungs.
Pleural Pressure:
Pleural pressure refers to the pressure in the pleural cavity, which is the space between the lung and the chest wall. Normally, pleural pressure is slightly negative compared to atmospheric pressure. This negative pressure helps keep the lungs inflated against the chest wall. Changes in pleural pressure affect lung inflation and deflation during breathing.
Physiology:
Physiology is the branch of biology that deals with the normal functions of living organisms and their parts, including the study of how various bodily systems work. Respiratory physiology specifically focuses on the functions and mechanisms involved in breathing, gas exchange (oxygen and carbon dioxide), and the regulation of these processes.
Respiratory System:
The respiratory system is a biological system consisting of specific organs and structures involved in breathing and gas exchange. It includes the lungs, airways (such as the trachea and bronchi), diaphragm, muscles of respiration, and associated blood vessels and nerves. The primary function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment