Gills are rich in blood vessels that bring blood close to the surface for gas exchange, the respiratory function. The circulatory system then carries the oxygen from the gills to the cells of the body, providing the cells with the necessary oxygen to carry out cellular respiration.ills are rich in blood vessels that bring blood close to the surface for gas exchange, the respiratory function. The circulatory system then carries the oxygen from the gills to the cells of the body, providing the cells with the necessary oxygen to carry out cellular respiration.
In geology, rock or stone is a naturally occurring solid aggregate of one or more minerals or mineraloids. For example, the common rock granite is a combination of the quartz, feldspar and biotite minerals. The Earth's outer solid layer, the lithosphere, is made of rock.he types and abundance of minerals in a rock are determined by the manner in which the rock was formed. Many rocks contain silica (SiO 2); a compound of silicon and oxygen that forms 74.3% of the Earth's crust.
Rocks. A rock is a solid, inorganic, naturally-formed substance without a particular atomic structure or chemical composition. It's probably easier to just remember that rocks are made up of two or more minerals. Examples of rocks include granite, limestone, marble, pumice, obsidian, sandstone, shale and slate.inerals. A mineral is a solid, inorganic, naturally-formed substance that has a crystalline structure and specific chemical composition. I know that's a lot to take in, so let's break down this definition piece by piece. First of all, minerals are solid and formed naturally in the earth.