af Marco Hiram Domínguez Solís 1 måned siden
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The first division between continents was made by ancient Greek navigators, who named them 'landmass, terra firma'.
Generally classified by convention rather than any strict criteria, nowadays seven regions are regarded as continents from a geopolitical point of view.
Of the seven continents of the world, Africa is the second largest.
Africa comprises 54 countries and it is the hottest continent.
The equator passes through the middle of Africa and it receives direct sunlight throughout the year.
The world gets 66% of its chocolate, 50% of the gold and 95% of the diamonds from Africa.
Tapizadas y producidas por lóbulos del manto originados como repliegues de la pared del cuerpo
Lofóforo circular o espiralado
Epistoma
Registro fósil de 12,000 especies
Autozooides (portadores de lofóforo), heterozooides (incapaces de alimentarse) y cenozooides (zooides reducidos modificados para la fijación al sustrato)
Sin epistoma (ni procele)
Lofóforo circular o en forma de U
Boca cubierta, cavidad bucal, esófago, preestómago, estómago, intestino, recto y ano
Tronco alargado (metasoma)
Mesosoma con lofóforo
Epistoma con forma de alero
Phonoris y Phoronopsis
Australia is the world's smallest continent and is also known as an 'island continent' as it is surrounded by water on all sides.
It includes 14 countries and it is the least populated continent.
Its name comes from the Latin word 'australis' meaning 'southern' because it lies entirely on the south of the equator.
Metasoma Posterior (Con Metacele)
Mesosoma Medio (Con Mesocele)
Prosoma Anterior (Con Procele)
Australia is home to some animals that can't be found anywhere else in the world.
Name at least 6 of these unique animals.
