what are the types of blood cells?
Answers
Answer:
Red blood cell
white blood cell
platelets
are the different type of blood cell
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Answer:
types of blood cells.....
WBC-------white blood cells .
RBC--------red blood cells
Platelets
Explanation:
The cellular portion of blood contains red blood cells (RBCs), white blood cells (WBCs) and platelets. The RBCs carry oxygen from the lungs. The WBCs help to fight infection, and platelets are parts of cells that the body uses for clotting. All blood cells are produced in the bone marrow. As children, most of our bones produce blood. As we age this gradually diminishes to just the bones of the spine, sternum, ribs, pelvis and small parts of the upper arm and leg. Bone marrow that actively produces blood cells is called red marrow, and bone marrow that no longer produces blood cells is called yellow marrow. The process by which the body produces blood is called hematopoiesis. All blood cells (RBCs, WBCs and platelets) come from the same type of cell, called the pluripotential hematopoietic stem cell. This group of cells has the potential to form any of the different types of blood cells and also to reproduce itself. This cell then forms committed stem cells that will form specific types of blood cells.
Red blood cells (RBCs), also known as erythrocytes, are by far the most abundant cells in the blood. RBCs give blood its characteristic red color. 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.
There are several characteristics about RBCs that make them unusual. First, an RBC has a strange shape, which is a biconcave disc that is round and flat, sort of like a shallow bowl. Second, an RBC has no nucleus. Third, an RBC can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries. Most importantly, the primary function of red blood cells is to transport oxygen from the lungs to the cells of the body. An RBC contains hemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it. Hemoglobin combines loosely with oxygen in the lungs, where the oxygen level is high, and then easily releases it in the capillaries, where the oxygen level is low. Each molecule of hemoglobin contains four iron atoms, and each iron atom can bind with one molecule of oxygen for a total of four oxygen molecules. The iron in hemoglobin gives blood its red color.