Adventitious

Adventitious

Adventitious is a term used in various scientific fields, including medicine, botany, and biology, to describe something that occurs accidentally or in an unusual location. In the medical context, adventitious often refers to abnormal sounds or growths that are not normally present.

Medical Context

In medicine, the term "adventitious" is frequently used to describe abnormal lung sounds that are heard during auscultation with a stethoscope. These sounds can indicate various underlying conditions and are classified into different types:

• Crackles (Rales): These are discontinuous, brief, popping sounds that are similar to the sound of wood burning in a fireplace. Crackles can be further classified into fine or coarse, depending on their pitch and duration. They are often associated with conditions such as pneumonia, heart failure, and pulmonary fibrosis.

• Wheezes: These are continuous, musical sounds that are usually high-pitched and are often heard during expiration. Wheezes are commonly associated with asthma, chronic obstructive pulmonary disease (COPD), and other conditions that cause airway narrowing.

• Rhonchi: These are low-pitched, continuous sounds that resemble snoring. Rhonchi are often associated with secretions in the larger airways and can be heard in conditions such as bronchitis.

• Stridor: This is a high-pitched, wheezing sound caused by disrupted airflow. It is often heard during inspiration and is associated with upper airway obstruction.

Botanical Context

In botany, adventitious refers to structures that develop in unusual places. For example, adventitious roots can grow from stems or leaves rather than from the root system. This can occur in response to environmental conditions or as a result of injury.

Biological Context

In a broader biological context, adventitious can describe any organ or structure that appears in an unusual location. This can include adventitious buds, which are buds that form on parts of the plant other than the usual locations, such as the stem or root.

Also see

• Auscultation
• Pulmonary fibrosis
• Asthma
• Chronic obstructive pulmonary disease
• Pneumonia
• Botany

Resources

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Source: Data courtesy of the U.S. National Library of Medicine. Since the data might have changed, please query MeSH on Adventitious for any updates.

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