BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
BLOOD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It has oval blood cells with a nucleus
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It has oval, un-nucleated RBCs
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It has circular, un-nucleated RBCs
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It has circular blood cells with a nucleus
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Detailed explanation-1: -The nuclei stain a dark blue. Of course, the red cells don’t have nuclei. Because mammalian red blood cells are biconcave they will not appear as uniform disks in the microscope field. Examination at 400x reveals them to be thin in the center.
Detailed explanation-2: -Human blood appears to be a red liquid to the naked eye, but under a microscope we can see that it contains four distinct elements: plasma. red blood cells. white blood cells.
Detailed explanation-3: -RBCs are type of blood cells, which contains hemeglobin, thereby transports oxygen in blood. It lacks nucleus in mammals (man, rabbit and rat) but it is nucleated in frog.
Detailed explanation-4: -Red Blood Cells are produced in the bone marrow and they have a nucleus when they are initially produced. Later, they lose nucleus in order to accommodate more haemoglobin so that they can transport more amount of oxygen. Therefore they are still considered as cells.