Question

w Sheet 35 Why does oxygen moet ning Prepared Slides of Trachea and Lung Tissue al characteristics of the alveoli make them an ideal site for the diffusion of gases? an walls, anoa surface area move from the alcol into the pulmonary capillary blood docube com the e blood due to himney O2 Leveleintre aluco no 12. Myou observed pathological ng tissued pathological Comprar logicallung sections, record your observations. Also record how the tissue difered from the table below using your answers. Stide type Comparison to normal lung tissue

Answer 1

The primary function of the lungs is respiration. It makes its function possible by having bronchi, bronchioles, and alveoli which makes the air diffusion possible. Lung diseases are abnormalities in the structure and function of the lung, and they can be broadly classified under four heads- obstructive lung diseases, restrictive lung diseases, infectious lung diseases, and neoplastic lung diseases.

Here, we will be focusing on obstructive lung diseases which are- asthma, bronchiectasis, chronic bronchitis, and emphysema. Observations about these diseases will be made through its sectional study.

Slide type	Observation	Comparision to normal lung tissue
Asthma	The lung tissue will be hyperinflated due to the presence of the eosinophils which appear prominent under the microscope.	The lung tissues are not inflated and the airways are not blocked.
Bronchiectasis	Dilation of the bronchi and the bronchioles are observed. Over time the elasticity of the walls becomes weak.	The bronchi and the bronchioles are normal, they are not dilated.
Emphysema	A large number of bullae are observed under the microscope. Bullae are airspaces that are dilated. The lung parenchyma is lost in this case.	Bullae are not observed. Airspaces have a normal size.
Chronic bronchitis	Edema of the mucous membranes are observed	The mucus membrane appears normal.