papilla

Examples of papilla in the following topics:

• Reception and Transduction

  • A taste bud is a cluster of gustatory receptors (taste cells) that are located within the bumps on the tongue called papillae (singular: papilla) .
  • There are several structurally-distinct papillae.
  • The large circumvallate papillae contain up to 100 taste buds and form a V near the posterior margin of the tongue.
  • (a) Foliate, circumvallate, and fungiform papillae are located on different regions of the tongue.
  • (b) Foliate papillae are prominent protrusions on this light micrograph.

• Gustation: Taste Buds and Taste

  • The tongue contains papillae, or specialized epithelial cells, which have taste buds on their surface.
  • There are three types of papillae with taste buds in the human gustatory system:
  • fungiform papillae, which are mushroom-shaped and located at the tip of the tongue;
  • foliate papillae, which are ridges and grooves toward the back of the tongue;
  • circumvallate papillae, which are circular-shaped and located in a row just in front of the end of the tongue.

• Nephron: The Functional Unit of the Kidney

  • The collecting ducts amass contents from multiple nephrons, fusing together as they enter the papillae of the renal medulla.
  • 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.

• Characteristics and Evolution of Amphibians

  • Additional characteristics of amphibians include pedicellate teeth (teeth in which the root and crown are calcified, separated by a zone of noncalcified tissue) and a papilla amphibiorum and papilla basilaris (structures of the inner ear that are sensitive to frequencies below and above 10,00 hertz, respectively).

• Blood Supply to the Epidermis

  • This is named for its fingerlike projections called papillae, that extend toward the epidermis and contain terminal networks of blood capillaries.

• Taste and Smell at Birth and in Old Age

  • Taste buds contain the receptors for taste and are located around the small structures (papillae) on the upper surface of the tongue, soft palate, upper esophagus, and epiglottis.
  • These papillae are involved in detecting the five (known) elements of taste perception: salty, sour, bitter, sweet, and umami.

• Kidney Function and Physiology

  • The collecting ducts collect filtrate coming from the nephrons and fuse in the medullary papillae.
  • From here, the papillae deliver the filtrate, now called urine, into the minor calyces that eventually connect to the ureters through the renal pelvis.

• Hair

  • It is supplied with nutrients via blood by a structure called the hair papilla. 

• Tastes and Odors

  • These taste buds, located in papillae which are found across the tongue, are specific for the five modalities: salt, sweet, sour, bitter and umami.

• Tissues and Aging

  • The number of fungiform papillae of the tongue decline by 50% by the age of 50.