(redirected from RBC)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia.


(ĭrĭth`rəsīt'): see bloodblood,
fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts (5.6 liters) of blood.
..... Click the link for more information.



a red blood corpuscle, or cell, in man, the vertebrates, and some invertebrates (echinoderms). Erythrocytes transport oxygen from the lungs to the tissues, and carbon dioxide from the tissues to the lungs. They regulate the acid-base balance and maintain osmotic balance in the blood and tissues. In addition, amino acids and lipids are absorbed from the blood plasma, and transported to the tissues, by erythrocytes.

Mature mammalian and human erythrocytes lack the nucleus that is present in the early stages of their development—that is, in the erythroblasts. They have the shape of a biconcave disk. Erythrocytes consist mainly of the respiratory pigment hemoglobin, which is responsible for the red color of blood. The erythrocytes of birds, reptiles, amphibians, and fishes are nucleated. The erythroblasts’ actively functioning nuclei gradually become inactive in the course of the erythrocytes’ development; they can, however, be reactivated. At the same time, ribosomes and other constituents that participate in protein synthesis disappear from the cytoplasm. The cell (or plasma) membrane plays an important role by permitting the passage of gases, ions, and water in the erythrocytes. On the surface of the lipoprotein membrane are specific glycoprotein antigens, or agglutinogens—the blood group factors responsible for the agglutination of erythrocytes.

The efficient functioning of hemoglobin depends on the erythrocytes’ area of surface contact with the environment. The smaller the erythrocytes, the greater their total surface area. The lower invertebrates have large erythrocytes (measuring, for example, 70 micrometers in diameter in the caudate amphibian Amphiuma), and the higher vertebrates have smaller ones (4 micrometers in diameter in goats). Human erythrocytes vary in diameter from 7.2 to 7.5 micrometers.

The number of erythrocytes in the blood normally remains constant, ranging from 4.5 to 5 million in 1 mm3 of human blood. The life-span of a human erythrocyte averages 125 days; approximately 2.5 million erythrocytes are formed and an equal number are destroyed every second. The total number decreases in anemia and increases in polycythemia. In the anemias, erythrocytes are found to change shape and size; they may be large (such as the megalocytes in Addison-Biermer anemia) or small, and they may, for example, be oval in shape (as in hemolytic anemia).



A type of blood cell that contains a nucleus in all vertebrates but humans and that has hemoglobin in the cytoplasm. Also known as red blood cell.


a blood cell of vertebrates that transports oxygen and carbon dioxide, combined with the red pigment haemoglobin, to and from the tissues
References in periodicals archive ?
Affiliated business arrangements provide RBC Mortgage with additional revenue and profits while the affiliated business gets a financing arm to help facilitate real estate transactions.
(12) The Board has reviewed the restrictions on disclosure in relevant jurisdictions in which RBC operates and has communicated with relevant government authorities concerning access to information.
Specificity between Antibodies and RBCs. To study the specificity between antibodies and RBCs, Anti-A or AntiB was immobilized on activated 11-MUA SAM surface, and RBC-A, RBC-B, or RBC-O was detected to determine both specific and nonspecific interactions.
This clinical presentation results from the causative biphasic immunoglobulin (Ig) G RBC autoantibody, which is a unique cold-activating G-class immunoglobulin that binds to the P antigen on RBCs in low temperatures in the extremities and fixes complement, resulting in hemolysis when RBCs are rewarmed in the patient's core.
As CN represents only 3.4% of RBC's assets and 2.2% of net income, this transaction is not financially material to RBC.
Royal Bank of Canada and its subsidiaries operate under the master brand name RBC. The North American financial services firm provides personal and commercial banking, wealth management services, insurance, corporate and investment banking and investor services on a global basis.
Jose Placido, the chief executive of RBC Investor Services, said: "Our clients will benefit from RBC's financial strength, complementary capabilities through wealth management and capital markets, and commitment to growth."
"The industry fundamentals are very attractive and this business is positioned for solid long-term growth," said Jim Westlake, Group Head, International Banking and Insurance, RBC. "We look forward to building on our strong relationships with clients in our goal to become the premier provider of investor services worldwide."
RBC reported a set of selective financials for 1Q12 yesterday (15 May).
2 September 2011 - US bank holding company Renasant Corporation (NASDAQ:RNST) announced that its subsidiary Renasant Bank had closed the acquisition of RBC Bank's trust department in Birmingham, Alabama.
RBC Capital Markets announced the appointment of Michael Rudd as a director to its Fixed Income platform in New York.