One of these subsequent events is organogensis, which gastrulation makes possible by allowing the different germ layers to differentiate into major body tissues and form functioning organs. The germ layers that are established during gastrulation are the endoderm, mesoderm, and ectoderm.
Eilean Donan Castle is a medieval castle on the small island of Eilean Donan in Loch Duich in the western Highlands of Scotland.The island is dominated by its famous picturesque castle.ilean Donan Castle is a medieval castle on the small island of Eilean Donan in Loch Duich in the western Highlands of Scotland.
Plan of Belvoir Castle (Israel). A concentric castle is a castle with two or more concentric curtain walls, such that the inner wall is higher than the outer and can be defended from it.The word concentric does not imply that these castles were circular; in fact if taken too literally the term concentric is quite misleading.lan of Belvoir Castle (Israel). A concentric castle is a castle with two or more concentric curtain walls, such that the inner wall is higher than the outer and can be defended from it.