white pulp

Examples of white pulp in the following topics:

• Spleen

  • Red pulp is the site of blood filtration in the spleen.
  • White pulp is secondary lymphoid tissue that is similar to that in the adenoid tonsils.
  • Antigens are also filtered by the red pulp, which may be presented to naive lymphocytes in the white pulp of the spleen.
  • This causes modest increases in circulating white blood cells and platelets, diminished responsiveness to some vaccines, and increased susceptibility to infection by bacteria and protozoa.
  • This diagram of the spleen indicates the vein, artery, white pulp, red pulp, and capsule.

• Root Canal Therapy

  • Endodontic therapy is the treatment for the pulp of a tooth which results in the protection of the decontaminated tooth.
  • Root canals and their associated pulp chamber are the physical hollows within a tooth that are naturally inhabited by nerve tissue, blood vessels, and other cellular entities.
  • To cure the infection and save the tooth, the dentist drills into the pulp chamber and removes the infected pulp and then drills the nerve out of the root canal with long needle-shaped drills.
  • Sometimes the dentist performs preliminary treatment of the tooth by removing all of the infected pulp of the tooth and applying a dressing and temporary filling to the tooth.
  • After removing as much of the internal pulp as possible, the root canals can be temporarily filled with calcium hydroxide paste.

• Dietary Fiber

  • For example, plums and prunes have a thick skin covering a juicy pulp.
  • The plum's skin is a source of insoluble fiber while soluble fiber is in the pulp.

• Grey and White Matter

  • The basic pattern of the CNS is a central cavity surrounded by gray matter external to which is the white matter.
  • White matter only contains the myelinated axon tracts,  and not the cell bodies.  
  • Myelin also gives white matter its characteristic color.
  • This MRI highlights the location of white matter in the brain.
  • Distinguish between grey and white matter of the central nervous system

• Sciatic Nerve Injury

  • When there is a tear in the annulus fibrosus, the nucleus pulposus (pulp) may extrude through the tear and press against spinal nerves within the spinal cord, cauda equina, or exiting nerve roots, causing inflammation, numbness, or excruciating pain.

• Spinal Cord White Matter

  • The white matter of the spinal cord is composed of bundles of myelinated axons.
  • White matter is one of the two components of the central nervous system.
  • White matter tissue of the freshly cut brain appears pinkish white to the naked eye because myelin is composed largely of lipid tissue veined with capillaries.
  • White matter in non-elderly adults is 1.7-3.6% blood.
  • The white matter is white because of the fatty substance (myelin) that surrounds the nerve fibers (axons).

• White Matter of the Cerebrum

  • White matter is composed of myelinated axons and glia and connects distinct areas of the cortex.
  • White matter is one of the two components of the central nervous system (CNS).
  • In a freshly cut brain, the tissue of white matter appears pinkish white to the naked eye because myelin is composed largely of lipid tissue containing capillaries.
  • White matter appears white in this dissected human brain, while gray matter appears darker.
  • White matter is composed largely of myelinated axons.

• Components of Blood

  • Blood is composed of plasma and three types of cells: red blood cells, white blood cells, and platelets.
  • The cellular components of blood are erythrocytes (red blood cells, or RBCs), leukocytes (white blood cells, or WBCs), and thrombocytes (platelets).
  • By volume, the RBCs constitute about 45% of whole blood, the plasma about 54.3%, and white blood cells about 0.7%.
  • There are several different types of white blood cells: basophils, eosinophils, neutrophils, monocytes, natural killer cells, B- and T-cell lymphocytes, macrophages, and dendritic cells, all of which perform distinct functions.

• WBC Function

  • Each of the several types of white blood cells provide a specific major function in defending the body against infections.
  • Leukocytes (white blood cells) provide a number of functions that are primarily related to the immune system goal of defending the body from pathogens (foreign invaders).

• Leukemia

  • Leukemia is a term covering a spectrum of cancers of the blood or bone marrow characterized by an increase in immature white blood cells.
  • Chronic leukemia is characterized by the excessive build up of relatively mature, but still abnormal, white blood cells.
  • Typically taking months or years to mature, the cells are produced at a much higher rate than normal, resulting in many abnormal white blood cells.
  • In myeloid or myelogenous leukemia, the cancerous change takes place in a type of marrow cell that normally goes on to form red blood cells, some other types of white cells, and platelets.
  • White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional.