CHALAZA Meaning and
Definition
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Chalaza refers to a structural component found in the anatomy of an egg, particularly in the avian species. It is a dense, rope-like structure that connects the yolk to the inner membrane of the eggshell. The chalaza is made up of twisted strands of albumen, or egg white, and is situated at opposite ends of the yolk.
Functionally, the chalaza provides stability and positioning for the yolk within the egg, preventing it from moving around freely and potentially interfering with embryonic development. This structure helps maintain the yolk's central position within the egg, allowing for balanced distribution of nutrients during incubation.
The presence of the chalaza is frequently used as an indicator of egg freshness. When an egg is freshly laid, the chalaza appears prominently as two distinct, spiral-like entities. As the egg ages, the chalaza tends to break down and become less discernible. Therefore, observing well-defined chalazae suggests a fresh, recently laid egg.
The chalaza is not a feature limited to birds' eggs, as some reptiles and amphibians also possess it. However, the term is primarily used in reference to avian eggs due to its consistent presence and distinctive appearance. Its essential role in maintaining embryo viability and allowing for optimal nutrient distribution emphasizes the importance of chalazae in egg structure and development.
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1. Chalazion. 2. The suspensory ligament of the yolk in a bird's egg. 3. In botany, the base of the body of the ovule where it blends with its coats.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for CHALAZA
- xhalaza
- vhalaza
- fhalaza
- dhalaza
- cgalaza
- cbalaza
- cnalaza
- cjalaza
- cualaza
- cyalaza
- chzlaza
- chslaza
- chwlaza
- chqlaza
- chakaza
- chapaza
- chaoaza
- chalzza
- chalsza
Etymology of CHALAZA
The word "chalaza" is derived from the Greek word "khalaza". In Greek, "khalaza" means "small lump" or "something that is coagulated". It was used to refer to the yolk of an egg where the chalaza is found. The term was adopted into English to specifically refer to the twisted, rope-like structure that attaches the yolk to the membrane at each end of the egg.
Similar spelling words for CHALAZA
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