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In the gonad of the invertebrate nematode Caenorhabditis elegans, a rachis is the central cell-free core or axis of the gonadal arm of both adult males and hermaphrodites where the germ cells have achieved pachytene and are attached to the walls of the gonadal tube.
Rachis o Raqui (también escrito Ratchis, Raditschs, Radics, Radiks; m. después de 757) fue duque de Friuli (739-744) y rey de los lombardos (744-749).
La colonne vertébrale ou rachis est composé de plusieurs parties (Figure 1) : Le rachis cervical s’articule avec la tête en haut et le rachis dorsal en bas. Il comprend 7 vertèbres.
Definición RAE de «raquis» según el Diccionario de la lengua española: 1. m. Anat. columna vertebral (‖ eje del neuroesqueleto de los vertebrados). 2.
The inflorescence of sorghum is the panicle. The vegetative primordium (growing tip) differentiates into the reproductive primordium. The shoot apex elongates into the main axis of the inflorescence, which is called the rachis. The rachis tapers off toward the top and is grooved longitudinally.
The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis. The central leaf, or mesophyll, consists of soft-walled, unspecialized cells of the type known as parenchyma.
The meaning of RACHIS is an axial structure. an axial structure: such as; the elongated axis of an inflorescence; an extension of the petiole of a compound leaf that bears the leaflets… See the full definition
