A lymphocyte is a type of white blood cell. White blood cells are part of your immune system and help your body fight off diseases, including infections and cancer. There are two main types of lymphocytes â B cells and T cells. B cells make antibodies that attack bacteria and toxins in the body.
- Mud, sand, and volcanic ash can make sedimentary rocks. bones leaves, stems, and other remains of living things. - Geologists classify metamorphic rocks according to the arrangement of the grains that make up the rock. - Metamorphic that have their grains arranged in parallel layers or bands are said to be foliated.
Chain silicates are common minerals in mafic igneous (especially pyroxenes) and metamorphic (especially amphiboles) rocks. Their structure is composed of many parallel chains (double chains in amphiboles) of silicon tetrahedra. Thatâs why the crystals of chain silicates tend to be elongated.