The red blood cell survives on average only 120 days. Mitochondria are found in all cells except the mature red blood cell. In humans, mature red blood corpuscles do not contain a nucleus and are therefore incomplete cells. Answer: D. Erythrocytes (red blood cells) Option D: About 95% of the volume of the formed elements consists of red blood cells (RBCs), or erythrocytes. The erythrocyte, commonly known as a red blood cell (or RBC), is by far the most common formed element: A single drop of blood contains millions of erythrocytes and just thousands of leukocytes.Specifically, males have about 5.4 million erythrocytes per microliter (µL) of blood, and females have approximately 4.8 million per µL.In fact, erythrocytes are estimated to make up about 25 … Two kidneys. Kidney and urinary system parts and their functions. They are circular with a diameter of 7.8 micrometers. Normal mature red blood cells (dissociates) are biconcave and disc-shaped and lack a nucleus. 4. Kidneys also regulate the acid-base balance and conserve fluids. Primary component of red blood cells: hemoglobin: Average red blood cell counts: men 5,500,000 per cubic millimeter, women 4,800,000 per cubic millimeter: function of red blood cells: critcal role in the transport of oxygen and carbon dioxide in the body: where red blood cells are formed: adult- red bone marrow embryo- spleen, liver, fetal yolk sac Proteins, such as hormones and … Human bone marrow stem cells create two million red blood cells a second. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The liquid portion of blood is called plasma and is 90% water. 3. Red blood cells. Red cells contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the body and then returns carbon dioxide from the body to the lungs so it can be exhaled. In many disorders or disease states, red blood cells may demonstrate variations in appearance or morphology as the result of pathological conditions. Plasma is also made up of dissolved minerals such as potassium, sodium, and calcium. Red blood cells, after separating from erythroblasts in the bone marrow, enter into the bloodstream and survive in circulation for about 3-1/2 months, though this lifespan can vary between 70 and 140 days. Complete Blood Cell Count HASPI Medical Anatomy & Physiology 13c Activity Background Blood appears to be just a red fluid, but is actually made up of many different types of cells, molecules, and liquids. Hematopoiesis is: Red blood cells are also known as erythrocytes or red blood corpuscles. The parietal cell of the stomach, which elaborates hydrochloric acid, is an example of such an eosinophilic (or acidophilic) cell . Other important functions of the kidneys include blood pressure regulation and the production of erythropoietin, which controls red blood cell production in the bone marrow. The remaining 5% of the volume of the formed elements consists of white blood cells (WBCs), or leukocytes, and cell fragments called platelets, or thrombocytes. Red Blood Cells. Erythrocytes are shaped like biconcave discs (donut). Some variations in size, shape, or color of red blood cells may be seen on microscopic examination with a Wright or similar Romanowsky-type stain. They are incapable of cell division or reproduction and self-maintenance and have very little metabolic activity. The cytoplasm of this cell contains numerous mitochondria and membranes, but little cytoplasmic RNA. Erythrocytes, or red blood cells (RBCs), have predictable dimensions which makes them a good “histologic ruler”. At their perimeter they are 2.6 micrometers thick, at the center they are only 0.8 micrometers thick. 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