What is the difference between a rock and a mineral? A rock is composed of combinations of minerals, each mineral having its own chemical formula and crystalline structure. Minerals are composed of an element or combination of eâ¦lements. Granite, for instance, is an intrusive igneous rock composed of the minerals quartz, feldspar, mica, hornblende, and other combinations or ratios of minerals.
Colloblasts are a cell type found in ctenophores. They are widespread in the tentacles of these animals and are used to capture prey. Colloblasts consist of a coiled spiral filament that is embedded in the epidermis and an axial filament with a granular dome.The apical surface of these cells consist of eosinophilic granules that are thought to be the source of adhesion.On contact, these granules rupture, and release an adhesive substance onto the prey. The spiral filament absorbs the impact of the rupture, preventing the ensnared prey from escaping.he apical surface of these cells consist of eosinophilic granules that are thought to be the source of adhesion. On contact, these granules rupture, and release an adhesive substance onto the prey. The spiral filament absorbs the impact of the rupture, preventing the ensnared prey from escaping.
Definition. A fibroblast is a cell that manufactures and maintains connective tissue, the structural framework that supports the organs of all animals. Fibroblasts secrete fibrous proteins and ground substance, which together form the extracellular matrix that is the basis of connective tissue.epending on where they are and what type of connective tissue they're building, fibroblasts can secrete several different types of fibrous proteins: â¢ Collagen is a tough, strong fiber that provides tensile and compressive strength to your organs and tissues. Collagen is the most abundant protein in the human body.