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.
Rocks There are three different types of rocks. You should know all about sedimentary, igneous and metamorphic rocks, so have a look at these pictures and see if you can identify each specimen.Classify these rocks. Try and work out whether they are sedimentary, igneous or metamorphic.Think about how they were formed. Copyright 2005, Oxford University Museum of Natural History Â© Sheared gneissBasalt LimestoneGranite.