Páginas: 5 (1050 palabras) Publicado: 1 de noviembre de 2010
To analyze and describe the different parts of the lungs

The lung is an important part of the human body and has a function that is critical of the human. In this laboratory we examine a lung of a pig killed 8 hours ago. Thus the objective of this lab is to analyze and describe the different parts of the lung. Knowing the parts of the lungs Helps Patients Understand why it'simportant to keep them healthy.

Humans have two lungs one that is left is divided into two lobes and the right into three lobes. The two lungs contain the same length of 2,400 km of airways and 500 million alveoli, lung capacity depends on the person's age, height, weight, sex, and usually between 4,000 and 6,000 cm3. Tall people have a larger lung capacity thansmaller people. Smokers have a lower capacity than nonsmokers. Lung capacity is also affected by altitude. People born and living in sea level will have a smaller lung capacity than people who spend their lives in a high altitude.

is the main airway that brings air to the lungs. The trachea, which is connected to the nose and mouth, is a bone, hollow tube into the frontof the neck. This tube continues down the chest where it forks to the left and right lung.

the right lung is divided into three lobes, upper, middle and bottom, by two interlobular fissures. One of them is separated from the lower and upper middle lobe and corresponds closely with the fissure in the left lung. The left lung is divided into two lobes, an upper and lower.

Bronchioles The bronchioles are structures that branch into the lungs. The bronchioles are connected to one side in the trachea and end in alveoli. The bronchioles lead air to the alveoli, where gas exchange occurs. They are also the first step after the alveoli in bringing carbon dioxide from the lungs when you exhale.

• The alveoli are small sacs that deal with gas exchange. These bags hold air,but are surrounded by capillaries. The capillaries have a small wall and fill with blood. The alveoli of the blood supply with oxygen that is inhaled. On the exhale, carbon dioxide arterial oxygen exchange. Carbon dioxide is eliminated from the body.

• The diaphragm is the muscle controlling the lungs inflate and expand. When inhalation, the diaphragm muscle contracts and presses thelower left and right lung, causing the lungs to inflate. On the exhale, the diaphragm relaxes and the lungs return to their original shape.

Read more: Las partes de la Pulmones |

In animals given different breathing system .These systems have different types of breathing, depending on thekind of animal of its energy needs and the environment in which they live. Diploblastic animals such as sponges and jellyfish, do not develop respiratory structure because they are animals that perform gas exchange of all cells with the aquatic environment surrounding respiratory system types that can be found among several species are breathing skin, gills, trachea and lungs. Most animals are madeup such a large number of cells that it is impossible that all they can perform the gas exchange with the environment around.
Gas exchange Takes place at a respiratory surface-a boundary Between the external environment and the interior of the organism. Gas exchange takes placeby the mechanisms of the heart and lungs. The blood carries oxygen, carbon dioxide and hydrogen ions between tissues and lungs. Most CO2 is transported dissolved in blood plasma. Gas exchange in the pulmonary alveoli Occurs by passive diffusion of gases Between the alveolar gas and the blood in lung capillaries.

Respiration is the...
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