Relationship between structure and function of alveoli

Function of the Alveoli

relationship between structure and function of alveoli

Explain the relationship between the structure and function of alveoli Gaseous exchange relies on simple diffusion. In order to provide sufficient oxygen and to. Pulmonary alveoli – tiny sacs (air sacs) delineated by a single-layer The structure of the lungs includes the bronchial tree – air tubes. The structure of the alveolar capillary network is considerably .. 5 to 1 cm H2O. Based on the establishment of structure–function relationship.

It also helps in separation of membranes and increasing the exchange of gases.

relationship between structure and function of alveoli

If the endothelium of the alveolus gets damaged, the great alveolar cells help in repairing them. The alveolus also consists of macrophage cells.

Structure and function of the lungs

These cells help in destroying any foreign matter like bacteria, etc. So, basically the function and structure is specifically designed to help in the exchange of gases efficiently with the help of: Extremely thin walls Large surface area in relation to the volume Fluid lining that helps in exchange of dissolved gases Number of capillaries surrounding each alveolus.

What is the Function of the Alveoli The basic function of alveoli is exchange of gases. Its structure is the site where the gaseous exchange during respiration takes place.

These structures are surrounded by capillaries carrying blood.

The micromechanics of lung alveoli: structure and function of surfactant and tissue components

The exchange of carbon dioxide in the blood from these capillaries occurs through the walls of alveolus. The alveoli begins to function when we breathe in air through our nostrils. The air passes through a long route consisting of various organs of the respiratory system. These organs include the nasal passages, pharynx, larynx, trachea, main bronchi, small bronchial tubes, bronchioles, and finally reaching the alveolus through tiny air sacs.

The air contains oxygen that is absorbed by the blood flowing through the capillaries. This oxygen is then passed on to the circulatory system, thus completing the gaseous exchange cycle. During this gas exchange, no energy is required to be burned by the cells.

The gases move through a concentration gradient that is from high concentration to low concentration. This means that oxygen in the alveolus is in the high oxygen concentration gradient. It diffuses into the blood that is in the low oxygen concentration gradient.

  • What are structure and function of alveoli?
  • How does the structure of the alveoli relate to its function in the lungs?
  • Function of the Alveoli

This is because of the continuous oxygen consumption in the body. The same thing happens in case of carbon dioxide. Blood contains high concentration of carbon dioxide and alveoli contains low concentration. The respiratory airways include the respiratory apertures mouth and nosethe trachea and a branching system of long, flexible tubes bronchi that branch of to shorter and narrower tubes broncheoli until they end in sacs called the pulmonary alveoli.

The lungs encompass the entire system of tubes branching out from the main bronchi to the alveoli.

relationship between structure and function of alveoli

Measuring the functioning of the lungs is a medical tool for diagnosing problems in the respiratory system. Measurements of lung function 2. Air volume in liters — lung capacity Maximum lung volume is known as TLC total lung capacity. It can be obtained by maximum strenuous inhalation.

The maximum lung volume of a healthy adult is up to liters. In children the maximum lung volume is up to liters, depending on age.

relationship between structure and function of alveoli

In infants it is up to milliliters. Differences in lung volume can only be caused by gender, age, and height. Essential air volume is the maximum volume utilized by the lungs for inhalation, also known as VC vital capacity. Residual volume RV is the volume of air remaining in the lungs after strenuous exhalation when the lungs feel completely empty.

Residual volume prevents the broncheoli and the alveoli from sticking together. Residual volume is approximately 1. The differential between total lung capacity and residual volume is the maximal volume utilized by the lungs in order to breath.

It is known as vital capacity VC. In an adult, the VC is between 3. Tidal Volume or VT is the volume of air displaced between normal inspiration and expiration.

What are structure and function of alveoli? | Socratic

In a healthy adult the tidal volume is approximately milliliters. Rate of airflow through the respiratory airways into and out of the lungs. This measures the effectiveness of airflow. Efficiency of diffusion of oxygen from the pulmonary alveoli into the blood not dealt with in this unit. TLC total lung capacity of children Examining lung function The most common, accessible and efficient method of measuring lung function is by means of a spirometer.

Its purpose is to diagnose obstructive diseases of the respiratory system. It measures the total lung capacity up to the residual volume this test does not show the rate at which oxygen is absorbed.

If the airways are blocked the rate of the airflow of the lungs decreases.

relationship between structure and function of alveoli