mesoderm
/'mesoudə:m/
Definition
Noun: * The middle germ layer in an embryo: In biology, this is one of the three primary layers of cells (germ layers) in a developing animal embryo. It is the layer situated between the ectoderm (outer layer) and the endoderm (inner layer). During development, the mesoderm gives rise to a wide range of internal structures and tissues.
Examples of Usage
- Noun:
- During gastrulation, the embryo forms three distinct layers: the ectoderm, the mesoderm, and the endoderm.
- Muscles, the skeletal system, and the circulatory system all originate from the mesoderm.
- The study focused on how specific genes guide the differentiation of mesoderm cells.
Advanced Usage
- "Derived from the mesoderm": A common phrase used to describe the embryonic origin of a tissue or organ.
- The heart is a mesodermal organ, meaning it is derived from the mesoderm.
Variants and Related Words
- Mesodermal (adjective): Of or relating to the mesoderm.
- The mesodermal layer gives rise to connective tissue.
- Mesenchyme (noun): A type of loose, embryonic connective tissue that arises from the mesoderm.
- Mesenchyme cells can migrate and differentiate into various cell types.
Synonyms
- Mesoblast: A less common, synonymous term for the mesoderm, especially in older texts.
Related Terms (Contextual)
- Ectoderm: The outermost germ layer, which gives rise to the skin and nervous system.
- Endoderm: The innermost germ layer, which gives rise to the lining of the digestive and respiratory tracts.
- Germ layer: A collective term for the three primary cell layers (ectoderm, mesoderm, endoderm) in early embryonic development.
Noun
-
the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue
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