Red blood cells are by far the most abundant cells in the blood. There are an average of 2,830,000 RBCs per cubic millimeter (microliter). RBCs account for approximately 40 to 45 percent of the blood. This percentage of blood made up of RBCs is a frequently measured number and is called the hematocrit. The ratio of cells in normal blood is 600 RBCs for each white blood cell and 40 platelets.
leukocytes
basophils
The least common blood cells are basophil granulocytes. These are referred to as basophils. Basophils make up 0.01 percent to 0.3 percent of white blood cells.
Leukocytes, or white blood cells, are typically ordered by abundance in the following way: neutrophils are the most common, followed by lymphocytes, monocytes, eosinophils, and finally basophils, which are the least common. This hierarchy reflects their relative prevalence in the bloodstream and their roles in the immune system. Neutrophils are primarily involved in fighting bacterial infections, while lymphocytes play key roles in adaptive immunity.
Basophils are one of the formed elements of blood. Basophils are the least common type of white blood cell. The formed elements of blood are red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
ABO blood typing is a method for differentiating individuals' blood based on the presence or absence of two antigens, A and B. The most common blood type in the world is O positive, which has neither the A nor the B antigen.
Officially, there are 8 different types of blood but it is close since there are positive and negative versions of blood types A,B,AB, and O. But the least common type would be blood type AB-.
The percentage varies across races. The worldwide percentage of people who have A positive blood is 28.27%.
AB -
AB-
The most common type of white blood cells are called Basophils
No, it's AB-