keel meaning, keel definition | English Cobuild dictionary. Search also in: Web News Encyclopedia Images. keel. ( keels plural & 3rd person present) ( keeling present participle) ( keeled past tense & past participle ) 1 n-count The keel of a boat is the long, specially shaped piece of wood or steel along the bottom of it.
The segmental arteries divide within the renal sinus to form the interlobar arteries which enter the kidney crossing the space between the calyces and adjacent cortical parenchyma, they continue by the space between pyramids (medulla) and the septa or columns of Bertin (the cortical tissue that surrounds pyramids).
Each kidney has a prominent medial indentation called the hilus which serves as the entry point of blood vessels, nerves and ureter. At the hilus an inner layer of the renal capsule extends into an internal cavity of the kidney called the renal sinus. This cavity is filled with blood vessels, nerves, and the tributaries of the collecting system that eventually form the ureters.