The first six digits of a card number (including the initial MII digit) are known as the issuer identification number (IIN). These identify the card issuing institution that issued the card to the card holder. The rest of the number is allocated by the card issuer. The card number's length is its number of digits. Many card issuers print the entire IIN and account number on their card.
Blood. 1  Blood is a connective tissue. 2  Blood is made of a liquid matrix called plasma and 3 types of formed elements (cells or cell fragments). 3  There are no visible fibers in plasma, but there are proteins that can be converted to fibers under certain conditions (e.g. blood vessel damage).
Human blood is made of plasma (makes up 54.3% of the blood volume) and several kinds of cells (corpuscles); these are 1  â. erythrocytes (RBC) â 45% of blood by volume. 2  leukocytes (WBC) â 0.7% of blood by volume. 3  thrombocytes (platelets) â minute amounts.