The phrase "a primary body" is correct and usable in written English.
It can be used in contexts where you are referring to a main or central entity, such as in scientific, organizational, or legal discussions.
Example: "The research focused on a primary body of evidence that supported the hypothesis."
Alternatives: "a main entity" or "a central body".
The literature searches and expert feedback produced a primary body of results.
One key morphological feature that has contributed to the traditional super-phyletic relationships of animals is symmetry about a primary body axis.
The gravitational perturbation experienced by a secondary body (the planet) in orbit about a primary body (the star) is approximated by the lowest-order term in the potential expansion, which is the semidiurnal tide of degree 2 (Kaula, 1964).
A comprehensive analysis of animal anatomy produced by Beklemishev concluded that all animals are organized by a primary body axis (alternatively referred to as "anterior/posterior", "apical/basal", and "oral/aboral") [ 6].
Following the MA process, the Co20Ni20Fe20Al20Ti20 alloy was composed of a primary body-centered cubic (BCC) supersaturated solid solution and a face-centered cubic (FCC) supersaturated solid solution.
Nonetheless, these scenarios are testable and, on the surface, seem more likely than a scenario in which the Hox genes produced an independent primary body axis patterning network de novo.
A Hox cluster consisting of seven genes evolved prior to the divergence of protostomes and deuterostomes [41] and, as both insects and vertebrates utilize Hox genes to pattern a portion of their primary body axes, the Hox code can be said to predate the diversification of crown bilaterians.
Phylogenetic mapping of gene expression patterns on a molecular phylogeny suggests that differential expression along the primary body axis is a primitive feature of the Nematostella Hox-related genes, while differential expression along the secondary body axis evolved afterwards.
The outermost layer of cells surrounding the roots and stems of the primary body of a vascular plant (including the leaves, flowers, fruits, and seeds) is called the epidermis.
Another striking phenotype from the same inhibition experiment relates to a massive deformation of the primary body axis, the oral-aboral axis.
Early gene expression domains in N. vectensis appear to maintain a positional order along the primary body axis.
