Calues

Calues, also known as calyces or calices, are cup-shaped structures found in various biological contexts. In botany, calyces refer to the outermost whorl of floral leaves, collectively forming the calyx. These sepals, as they are individually called, typically enclose and protect the developing bud. They are often green but can also be colored, mimicking petals in some species. The number, shape, and fusion of sepals vary greatly among different plants, contributing to their classification and identification.

In anatomy, calyces are also found in the kidneys. These are funnel-shaped structures that collect urine produced by the nephrons. The renal papillae, which are the tips of the renal pyramids, drain into minor calyces. Several minor calyces then merge to form major calyces, and these in turn unite to form the renal pelvis, a larger basin that funnels urine into the ureter, which carries it to the bladder. The structure of the renal calyces is crucial for efficient urine collection and transport. Both botanical and anatomical calyces share a common descriptive characteristic: their cup-like form.