Papilla
Encyclopedia
The term papilla generally means a nipple
-like structure, and may refer to:
On the tongue
On a fish
On a sea cucumber
On a mushroom
Nipple
In its most general form, a nipple is a structure from which a fluid emanates. More specifically, it is the projection on the breasts or udder of a mammal by which breast milk is delivered to a mother's young. In this sense, it is often called a teat, especially when referring to non-humans, and...
-like structure, and may refer to:
- Mammary papilla, or nippleNippleIn its most general form, a nipple is a structure from which a fluid emanates. More specifically, it is the projection on the breasts or udder of a mammal by which breast milk is delivered to a mother's young. In this sense, it is often called a teat, especially when referring to non-humans, and...
- Amphibian papilla and basal papilla, part of the inner earInner earThe inner ear is the innermost part of the vertebrate ear. In mammals, it consists of the bony labyrinth, a hollow cavity in the temporal bone of the skull with a system of passages comprising two main functional parts:...
of the frog. - Interdental papillaInterdental papillaThe interdental papilla, also known as the gingival papilla, is the part of the gingiva that exists coronal to the free gingival margin on the buccal and lingual surfaces of the teeth....
, part of the gingiva between teeth - Dental papillaDental papillaThe dental papilla is a condensation of ectomesenchymal cells called odontoblasts, seen in histologic sections of a developing tooth. It lies below a cellular aggregation known as the enamel organ. The dental papilla appears after 8-10 weeks intra uteral life...
, cells involved in a developing tooth - Renal papillaRenal papillaIn the kidney, the renal papilla is the location where the medullary pyramids empty urine into the minor calyx. Histologically it is marked by medullary collecting ducts converging to form a duct of Bellini to channel the fluid. Transitional epithelium begins to be seen.-Role in disease:Some...
, in the kidney - Lacrimal papillaLacrimal papillaAt the basal angles of the lacus lacrimalis, on the margin of each eyelid, is a small conical elevation, the lacrimal papilla, the apex of which is pierced by a small orifice, the punctum lacrimale, the commencement of the lacrimal duct.-External links:*...
, on the eyelid - Major duodenal papillaMajor duodenal papillaThe common bile duct and the pancreatic duct together perforate the medial side of the second portion of the duodenum obliquely, some 7 to 10 cm below the pylorus, forming a structure called the major duodenal papilla....
, the opening of the pancreatic duct and common bile duct into the duodenum - Minor duodenal papillaMinor duodenal papillaThe minor duodenal papilla is the opening of the accessory pancreatic duct into the duodenum. It is sometimes absent, and often nonfunctional.The other names of minor duodenal papilla is Santorini's minor caruncle....
, the opening of the accessory pancreatic duct into the duodenum - Dermal papillaeDermal papillaeIn the human skin, the dermal papillae are small, nipple-like extensions of the dermis into the epidermis...
, at the base of every hair follicleHair follicleA hair follicle is a skin organ that produces hair. Hair production occurs in phases, including a growth phase , and cessation phase , and a rest phase . Stem cells are principally responsible for the production of hair.... - Papillary thyroid cancerPapillary thyroid cancerPapillary thyroid cancer or papillary thyroid carcinoma is the most common type of thyroid cancer, representing 75% to 85% of all thyroid cancer cases. It occurs more frequently in women and presents in the 30-40 year age group...
, a type of disease - PapillomaPapillomaPapilloma refers to a benign epithelial tumor growing exophytically in finger-like fronds. In this context papilla refers to the projection created by the tumor, not a tumor on an already existing papilla . When used without context, it frequently refers to infections caused by human...
, a benign epithelial tumor - Papillary musclePapillary muscleIn anatomy, the papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves via the chordae tendinae and contract to prevent inversion or prolapse of these valves.- Action :There are five total papillary muscles in the heart, three...
, a muscle in the heart - Cuticular papilla, a raised thickening in plant cuticlePlant cuticlePlant cuticles are a protective waxy covering produced only by the epidermal cells of leaves, young shoots and all other aerial plant organs without periderm...
, not large enough to be considered a trichome or hair
On the tongue
- Circumvallate papillaeCircumvallate papillaeThe circumvallate papillae are dome-shaped structures on the human tongue that vary in number from eight to twelve....
(contains taste buds) - Fungiform papillaFungiform papillaThe fungiform papillae are mushroom shaped papillae on the tongue. They are located on the top surface of the tongue, scattered throughout the filiform papilla but mainly at the tip and lateral margins of the tongue. They have taste buds on their superior surface which can distinguish the five...
(contains taste buds) - Filiform papillaFiliform papillaThe filiform papillae are one of the four types of lingual papillae, small prominences on the surface of the tongue. The filiform papillae are thin, long "V"-shaped cones that don't contain taste buds but are the most numerous, covering most of the dorsum...
(does not contain taste buds) - Foliate papillaeFoliate papillaeTaste-buds, the end-organs of the gustatory sense, are scattered over the mucous membrane of the mouth and tongue at irregular intervals. They occur especially in the sides of the vallate papillae. There is a localized area at the side of the base of the tongue, the foliate papillae, in which they...
(contains taste buds)
On a fish
- Genital papilla, a small tube on fish anatomyFish anatomyFish anatomy is primarily governed by the physical characteristics of water, which is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs more light than air does.- Body :...
, through which eggs or sperm are released - Papilla (fish mouth structure)Papilla (fish mouth structure)The papilla, in certain kinds of fish, particularly rays, sharks, and catfish, are small lumps of dermal tissue found in the mouth, where they are "distributed uniformly on the tongue, palate, and pharynx"...
, small lumps of dermal tissue found in the mouth which hold taste buds - The sensory papillae of the Amblyopsidae (cavefishes)
On a sea cucumber
- Papillae, conical fleshy protuberances on a sea cucumberSea cucumberSea cucumbers are echinoderms from the class Holothuroidea.They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide. There are a number of holothurian species and genera, many of which are targeted...
.
On a mushroom
- papilla (mycology), an acutely nipple-shaped protrusion in the center of the capPileus (mycology)The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp that supports a spore-bearing surface, the hymenium. The hymenium may consist of lamellae, tubes, or teeth, on the underside of the pileus...