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  Encyclopedia of Keywords > Body Cavity > Coelom   Michael Charnine

Keywords and Sections
COELOMATE ANIMALS
NEPHRON
FLUID-FILLED CAVITY
FLUID-FILLED BODY CAVITY
EMBRYONIC MESODERM
FLATWORMS LACK
INTRA-EMBRYONIC COELOM
PSEUDOCOELOM
EXTRAEMBRYONIC COELOM
INTRAEMBRYONIC COELOM
TRUE COELOM
SPLIT
SIDES
ENCLOSED
RISE
VERTEBRATES
LAYERS
ORIGIN
WASTES
BILATERAL
COMPARTMENTS
REPRODUCTIVE ORGANS
BILATERIA
GONADS
GERM CELLS
FORMS
ARCHENTERON
KIMBERELLA
LOCOMOTION
HYDROSTATIC SKELETON
GROUPS
PLATYHELMINTHES
DEUTEROSTOMES
FORMATION
SMALL AREAS
PERITONEUM
NEPHRIDIA
ARTHROPODS
BLOOD
LEECHES
ORGANS
ENDODERM
FORM
SEPTA
LINING
GUT
Review of Short Phrases and Links

    This Review contains major "Coelom"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. A coelom is a cavity lined by an epithelium derived from mesoderm.
  2. Coelom is another term for body cavity, and refers to the region between an animal's outer covering, and the outer covering of the gut cavity.
  3. The coelom is divided into a sequence of compartments by walls called septa. (Web site)
  4. The coelom is not subdivided by septa in most species, and it has been filled with muscle and connective tissue. (Web site)
  5. The coelom was apparently lost or reduced as a result of mutations in certain types of genes that affected early development. (Web site)

Coelomate Animals

  1. Coelomate animals have a coelom, this is a body cavity that has a mesodermal lining. (Web site)

Nephron

  1. In pronephroi the glomerulus (or glomus if it extends over multiple body segments) projects into the coelom rather than into the proximal tip of the nephron. (Web site)

Fluid-Filled Cavity

  1. Snails, clams, and octopi are the first animals with a true coelom, a hollow, fluid-filled cavity completely surrounded by the mesoderm. (Web site)

Fluid-Filled Body Cavity

  1. Coelom: fluid-filled body cavity lines with the mesoderm 20.
  2. All were presumed to be pseudocoelomates, having a fluid-filled body cavity derived in a different way than a "true" coelom. (Web site)

Embryonic Mesoderm

  1. Unlike a true coelom, a pseudocoel is not fully enclosed by a cell layer derived from the embryonic mesoderm.

Flatworms Lack

  1. Flatworms lack a coelom (body cavity), respiratory system, and circulatory system, but are the most primitive invertebrates to have a brain. (Web site)
  2. Flatworms lack a coelom, as do their closest relatives, the microscopic Gastrotricha.

Intra-Embryonic Coelom

  1. Intra-embryonic Coelom Formation (continue)  With the formation of the intra-embryonic coelom, the lateral plate mesoderm splits into: 1.

Pseudocoelom

  1. The digestive chamber has two openings, a mouth and an anus, and there is also an internal body cavity called a coelom or pseudocoelom. (Web site)

Extraembryonic Coelom

  1. This new cavity is called the extraembryonic coelom and will become the future chorionic cavity. (Web site)

Intraembryonic Coelom

  1. Mammalian embryos develop two coelomic cavities: the intraembryonic coelom and the extraembryonic coelom (or chorionic cavity). (Web site)
  2. The intraembryonic coelom is the only cavity that persists in the mammal at term, which is why its name is often contracted to simply coelomic cavity. (Web site)
  3. The intraembryonic coelom is lined by somatic and splanchnic lateral plate mesoderm, while the extraembryonic coelom is lined by extraembryonic mesoderm.

True Coelom

  1. The body cavity consists of a haemocoel, but the only place where a true coelom can be found is around the gonad. (Web site)
  2. The Annelids are segmented and have a true coelom (body cavity), and exhibit organ systems. (Web site)
  3. The earthworm (annelid) is a coelomate because it has a true coelom within its mesoderm layer.

Split

  1. The coelom of the body forms from a split of the mesoderm along the somite axis. (Web site)

Sides

  1. If this body cavity is formed within the mesoderm so that mesoderm tissue is found on both sides of the body cavity, the body cavity is called a coelom. (Web site)
  2. The coelom extends posteriorly on both sides of the foregut as the mesoderm continues to split. (Web site)

Enclosed

  1. Enclosed between the two is a space called coelom. (Web site)

Rise

  1. D. Mesoderm breaks up into mesodermal segments; cavities form within segments and eventually fuse to give rise to coelom. (Web site)

Vertebrates

  1. Unlike all other vertebrates, the proximal tubule of the nephron is also connected with the coelom, provided lubrication. (Web site)

Layers

  1. The mesoderm in the disc soon split into two layers, and the space between the layers becomes the extraembryonic coelom. (Web site)

Origin

  1. The origin of the coelom and segments.

Wastes

  1. These cells break loose into the coelom and absorb wastes.

Bilateral

  1. Based on their bilateral larvae, many zoologists argue that echinoderm ancestors were bilateral and that their coelom had three pairs of spaces (trimeric).

Compartments

  1. The body cavity is a coelom, which is divided into a sequence of compartments by walls called septae. (Web site)

Reproductive Organs

  1. The coelom also houses the reproductive organs and alimentary canal. (Web site)

Bilateria

  1. Most Bilateria also have a type of internal body cavity, called a coelom. (Web site)

Gonads

  1. A coelom is, however, formed around the gonads and the waste-eliminating nephridia.
  2. Both the gonads and the gonoduct are derived from true coelom tissue.

Germ Cells

  1. When the connection to the coelom was lost an alternative duct system, the parmesonephric ducts were developed to provide passage for the germ cells. (Web site)

Forms

  1. Spaces within the lateral plate are enclosed and forms the intraembryonic coelom.

Archenteron

  1. In the advanced gastrula, the anterior portion of the archenteron gives rise to a body cavity (known as a coelom) by a process of evagination.

Kimberella

  1. Kimberella is the first known animal that paleontologists can be sure had a coelom, he says.
  2. Kimberella, an advanced metazoan in the Ediacaran fauna, which is the first known organism to have a coelom or body cavity.

Locomotion

  1. One basic advantage for those organisms with a coelom is greater control over locomotion. (Web site)

Hydrostatic Skeleton

  1. The coelom provides a hydrostatic skeleton that allows new and diverse modes of locomotion.
  2. Next to each name indicate whether the hydrostatic skeleton is a coelom, pseudocoelom, or acoelom.

Groups

  1. These groups have a reduced coelom, called a pseudocoelom. (Web site)

Platyhelminthes

  1. Platyhelminthes gave rise to the coelomates, which have a coelom, or internal body cavity.

Deuterostomes

  1. In deuterostomes the mesoderm forms as evaginations of the developed gut that pinch off, forming the coelom.
  2. Deuterostomes are also known as enterocoelomates because their coelom develops through enterocoely.
  3. In Deuterostomes, the coelom forms by enterocoely: mesoderm buds from the walls of the archenteron and hollows to become the coelomic cavities. (Web site)

Formation

  1. In protostomes, the process of coelom formation is called schizocoely.
  2. Mesoderm is found in all large, complex animals, and allows the formation of a coelom, which allows more room for independent growth of the body organs.
  3. Formation of the Intraembryonic Coelom: Forms as a division of the lateral-plate mesoderm. (Web site)

Small Areas

  1. Hence the coelom of the arthropod is reduced to small areas around the reproductive and excretory systems. (Web site)

Peritoneum

  1. Others, such as roundworms, have a "false" coelom (pseudocoel), not lined with peritoneum. (Web site)

Nephridia

  1. Gametes are shed into the coelom and carried outside the body through the nephridia or as a result of the body wall actually rupturing. (Web site)

Arthropods

  1. Like other arthropods, spiders are coelomates in which the coelom is reduced to small areas round the reproductive and excretory systems. (Web site)

Blood

  1. They developed out of the turbellaria of the sixth stage by forming a true body cavity (a coelom) and blood in their interior.

Leeches

  1. Among the leeches the coelom is largely filled in with tissue. (Web site)

Organs

  1. Organs formed inside a coelom can freely move, grow, and develop independently of the body wall while fluid cushions and protects them from shocks.

Endoderm

  1. The extraembryonic coelom is formed as a progression of the splanchnic mesoderm and ectoderm as well as the somatic mesoderm and endoderm around the yolk. (Web site)

Form

  1. As the mesoderm differentiates, one region known as the lateral plate mesoderm splits to form two layers separated by an intraembryonic coelom. (Web site)
  2. Soon pockets form in the reticulum, which ultimately coalesce to form the chorionic cavity or extraembryonic coelom. (Web site)

Septa

  1. Except in leeches, the coelom is partially subdivided by septa. (Web site)

Lining

  1. All organisms more complex than a platyhelminthes have a coelom, whose lining is formed by the mesoderm.

Gut

  1. The gut is separated from the body wall by the body cavity, called the coelom. (Web site)

Categories

  1. Body Cavity
  2. Medicine > Anatomy > Tissues > Mesoderm
  3. Flatworms
  4. Annelids
  5. Protostomes

Related Keywords

    * Annelids * Bilateral Symmetry * Body Cavity * Cavities * Cavity * Flatworms * Mesoderm * Mollusks * Protostomes
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  Short phrases about "Coelom"
  Originally created: August 01, 2010.
  Links checked: January 02, 2013.
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