I nclude the bone marrow, lymph nodes, spleen, and thymus. Precursor cells in the bone marrow produce lymphocytes. B-lymphocytes (B-cells) mature in the bone marrow. T-lymphocytes (T-cells) mature in the thymus gland. Besides providing a home for lymphocytes (B-cells and T-cells), the ducts of the lymphatic system provide transportation for proteins, fats, and other substances in a medium called lymph.
A book that is made with a stiff paper cover and bound directly to the text block. Many paperback books are converted to hardcover books by mylar binding. Perfect bind
Parts of Your Self-Published Book. Including all of the necessary parts of a book and putting them in the right order is the first step to making your book credible and professional. The inside of your book, which we call the book block, is divided into three main sections: the front matter, book block text, and back matter.