primitive node معنى"primitive node" أمثلة على "primitive" معنى "node" معنى "primitive" معنى "node" معنى "primitive cell" معنى "primitive cultivars" معنى "primitive culture" معنى "primitive groove" معنى "primitive line" معنى "primitive ovum" معنى "primitive pit" معنى "primitive reflexes" معنى "primitive sheath" معنى "primitive streak" معنى "primitive technology" معنى "primitive water" معنى "primitive weapons" معنى "a-v node" معنى "atrioventricular node" معنى "b-node" معنى "child node" معنى "cloquet's node" معنى "diskless node" معنى "hensen's node" معنى "leaf node" معنى أمثلة A primitive pit forms as a depression in the centre of the primitive node which connects to the notochord which lies directly underneath.
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