Compare the RBCs in the following with the human RBC: salamander, snake, ostrich, red kangaroo and camel. What are the structural variations observed in the RBC and why?

Which among these animals have a nucleated RBC? What is the use of a nucleated and non- nucleated RBC?

Answer 1

Only camel red blood cell is nucleated. Human rbc is without nucleus.

It is an adaptation in mammals that the red blood cell nucleus has lost its function and is unable to divide when it is in the blood stream. Red blood cells without nuclei are found in all other animals, such as salamanders, snakes, and ostriches.

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Answer 2

Piper Anderson

Nucleated red blood cells (RBCs) are found in salamanders and snakes, while enucleated RBCs, like those found in humans, are found in ostriches, red kangaroos, and camels. The structural variations reported in these animals include variations in size, shape, and nucleus presence or absence. These variations are the result of evolutionary adaptations to meet particular physiological needs, such as oxygen transport efficiency, environmental conditions, and metabolic demands.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.