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Etymology: L, ren, kidney; Gk, pyramis
any one of several conical masses of tissue that form the kidney medulla. The base of each pyramid adjoins the kidney's cortex; the apex terminates at a renal calyx. The pyramids consist of the loops of Henle and the collecting tubules of the nephrons.
re·nal pyr·a·mid(rē'năl pir'ă-mid)
The inner mass of the kidney consisting of 5 to 11 conical renal pyramids separated by renal columns. The renal pyramids contain the loops of Henle and the collecting ducts. The renal columns contain interlobar arteries and veins.
See also: pyramid
Malpighi,Marcello, Italian anatomist, histologist, and embryologist, 1628-1694.
malpighian bodies - small nodular masses of lymphoid tissue attached to the sides of the smaller arterial branches. Synonym(s): malpighian glands; malpighian nodules; splenic lymph follicles
malpighian capsule - Synonym(s): glomerular capsule
malpighian cell - a cell of the stratum spinosum of the epidermis.
malpighian corpuscles - Synonym(s): renal corpuscle
malpighian glands - Synonym(s): malpighian bodies
malpighian glomerulus - a tuft formed of capillary loops at the beginning of each nephric tubule in the kidney. Synonym(s): malpighian tuft
malpighian layer - Synonym(s): malpighian stratum
malpighian nodules - Synonym(s): malpighian bodies
malpighian pyramid - Synonym(s): renal pyramid
malpighian rete - Synonym(s): malpighian stratum
malpighian stigmas - the points of entrance of smaller veins into the larger veins of the spleen.
malpighian stratum - the living layer of epidermis comprising the stratum basale, stratum spinosum, and stratum granulosum. Synonym(s): malpighian layer; malpighian rete
malpighian tubules - in insects, slender tubular or hairlike excretory structures.
malpighian tuft - Synonym(s): malpighian glomerulus
malpighian vesicles - the minute air-filled vesicles on the surface of an expanded lung.