Signs and symptomsEdit. PCS has consistent characteristics. Its symptoms begin with a sudden onset of anterior chest pain on the left side of the chest. The pain is localized and does not radiate like heart attack pain typically does. Breathing in, and sometimes breathing out, often intensifies the pain. Moving also intensifies the pain.
It's in all the science books. Cells are the basic unit of structure and function of the human, animal, and any other living thing. The cells travel through carrying oxygen and everything else that your body, and brain, needs. Cells are a small unit just like a living matter.
Structure of an animal cell. The cell (from Latin cella, meaning small room) is the basic structural, functional, and biological unit of all known living organisms. A cell is the smallest unit of life that can replicate independently, and cells are often called the building blocks of life. The study of cells is called cell biology.