medullary

(adjective)

pertaining to, consisting of, or resembling, marrow or medulla

Related Terms

Examples of medullary in the following topics:

  • Nephron: The Functional Unit of the Kidney

    • This last part of the nephron connects with and empties its filtrate into collecting ducts that line the medullary pyramids.
    • As urine travels down the collecting duct system, it passes by the medullary interstitium, which has a high sodium concentration as a result of the loop of Henle's countercurrent multiplier system.
    • Urine leaves the medullary collecting ducts through the renal papillae, emptying into the renal calyces, the renal pelvis, and finally into the bladder via the ureter.

  • Meristems

    • Apical meristems are organized into four zones: (1) the central zone, (2) the peripheral zone, (3) the medullary meristem and (3) the medullary tissue .
    • Pictured here are the (1) central zone, (2) peripheral zone, (3) medullary meristem and (3) medullary tissue.

  • Growth of Bone

    • Osteoclasts, cells that work to break down bone, resorb old bone that lines the medullary cavity.
    • The erosion of old bone along the medullary cavity and the deposition of new bone beneath the periosteum not only increase the diameter of the diaphysis, but also increase the diameter of the medullary cavity.

  • Epinephrine and Norepinephrine

    • Norepinephrine is synthesized from dopamine by dopamine β-hydroxylase in the secretory granules of the medullary chromaffin cells and is released from the adrenal medulla into the blood as a hormone.

  • Bone Development

    • Osteoclasts then break down some of the spongy bone to create a marrow, or medullary cavity, in the center of the diaphysis.

  • Bone Remodeling and Repair

    • Bone remodeling: The bony callus is then remodelled by osteoclasts and osteoblasts, with excess material on the exterior of the bone and within the medullary cavity being removed.

  • Kidney Structure

    • The arcuate, "bow shaped" arteries form arcs along the base of the medullary pyramids.

  • Kidney Function and Physiology

    • The collecting ducts collect filtrate coming from the nephrons and fuse in the medullary papillae.

  • Bone

    • Compact bone (or cortical bone), forming the hard external layer of all bones, surrounds the medullary cavity (innermost part or bone marrow).