blastoderm
/'blæstoudə:m/
Học thuậtThân thiện
Definition
- Noun:
- Embryonic cell layer: A blastoderm is a distinct layer of cells that forms on the interior surface of a blastula, which is an early stage in the embryonic development of many animals. This layer is the primary site from which the embryo proper develops.
Usage Examples
- Noun:
- The blastoderm is a critical structure in avian embryogenesis.
- Researchers observed the formation of the blastoderm under the microscope.
- The cells of the blastoderm will give rise to all the tissues of the organism.
Advanced Usage
- "Blastoderm vesicle": Sometimes used to describe the hollow sphere (blastula) lined by the blastoderm.
- The blastoderm vesicle marks a key transition before gastrulation.
- "Germinal disc/blastodisc": In the eggs of birds and reptiles, the blastoderm appears as a small, disc-shaped area on the yolk's surface.
- The blastodisc is visible as a whitish spot on the yolk of a fertilized egg.
Variants and Related Words
- Blastodermal (adj): Pertaining to or of the nature of a blastoderm.
- The blastodermal cells are highly proliferative.
- Blastula (n): The early embryonic stage, typically a hollow ball of cells, inside which the blastoderm forms.
- Blastocoel (n): The fluid-filled cavity inside the blastula, over which the blastoderm forms.
Synonyms
- Germinal layer: A general term for an embryonic cell layer.
- Embryonic disc/blastodisc: Specifically refers to the blastoderm in meroblastic cleavage (e.g., in bird or fish eggs).
Related Phrases and Terms
- Formation of the blastoderm: The process by which this cell layer develops.
- The formation of the blastoderm is driven by specific genetic programs.
- Blastoderm stage: A specific period in embryonic development characterized by the presence of this structure.
- The embryo at the blastoderm stage is highly sensitive to environmental changes.
Noun
- a layer of cells on the inside of the blastula