1 The cell walls of bacteria are mainly made up of polysaccharides (types of carbohydrate). 2  Cellulose (a type of carbohydrate) makes up most of plant cell walls. 3  Carbohydrates are linked to many proteins and lipids (fats), where they are vitally involved in cell interactions.
A volcano is a vent or chimney which transfers molten rock known as magma from depth to the Earth's surface.Magma erupting from a volcano is called lava and is the material which builds up the cone surrounding the vent. A volcano is active if it is erupting lava, releasing gas or generates seismic activity.hield volcano. When magma is very hot and runny, gases can escape and eruptions are gentle with considerable amounts of magma reaching the surface to form lava flows. Shield volcanoes have a broad, flattened dome-like shape created by layers of runny lava flowing over its surface and cooling.
Volcano. A volcano is a hole in Earth 's surface through which magma (called lava when it reaches Earth's surface), hot gases, ash, and rock fragments escape from deep inside the planet.The word volcano also is used to describe the cone of erupted material (lava and ash) that builds up around the opening.olcanoes are vents or fissures in Earth 's crust through which lava, gases, and pyroclastic debris are released. More commonly, the term volcano refers to the landform built up from the accumulation of lava and/or pyroclastic debris.