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The mesoglea is sandwiched between the epidermis and the gastrodermis. In some jellyfish the epidermis on the umbrella/bell surface seems to break off when the jellyfish grows so the mesoglea of older jellyfish is directly exposed to the water. [8] The mesoglea itself consists of multiple layers that can be differentiated by their electron density.
The mesohyl, formerly known as mesenchyme or as mesoglea, is the gelatinous matrix within a sponge. It fills the space between the external pinacoderm and the internal choanoderm . The mesohyl resembles a type of connective tissue and contains several amoeboid cells such as amebocytes , as well as fibrils and skeletal elements.
The mouth leads into the coelenteron, similarly to the hydranth, which then branches into 4 radial canals. The canals take the food around the entire body of the gonangia for full digestion. The endoderm of the gonangia is the inner lining to the canal system. The mesoglea can be found in the manubrium in between the endo- and ectoderm.
A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth. While this is true of any map, these distortions reach extremes in a world map.
The first fossil to be found in the area, Fractofusus misrai, was discovered in June 1967 by Shiva Balak Misra, an Indian graduate student studying geology at Memorial University of Newfoundland. [ 3 ] [ 4 ] In the mid-1980s, the site quickly became recognized as an important location containing possibly the oldest metazoan fossils in North ...
The Babylonian Map of the World (also Imago Mundi or Mappa mundi) is a Babylonian clay tablet with a schematic world map and two inscriptions written in the Akkadian language. Dated to no earlier than the 9th century BC (with a late 8th or 7th century BC date being more likely), it includes a brief and partially lost textual description.
Map showing the extent of Mesopotamia. The geography of Mesopotamia, encompassing its ethnology and history, centered on the two great rivers, the Tigris and Euphrates.While the southern is flat and marshy, the near approach of the two rivers to one another, at a spot where the undulating plateau of the north sinks suddenly into the Babylonian alluvium, tends to separate them still more ...
Tigris river flows through Mosul, near the ancient Assyrian city of Nineveh, which is a major settlement and hosts farmland in Upper Mesopotamia. The name al-Jazira has been used since the 7th century AD by Islamic sources to refer to the northern section of Mesopotamia, [citation needed] while the Lower Mesopotamia, also known as Sawād, is the southern part of Mesopotamia.