Retia mirabilia specially in thoracic region are extensively developed in

Artiodactyla

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Perrisodactyla

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Cetacea

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All of the above

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Solution

The correct option is B Cetacea
When the arteries and veins lying very close to each other forms a complex structure it is known as a rete mirabile, found in some vertebrates. The retia mirabilia of cetaceans in thoracic region are considered as one of the morphologic adaptations which modulate hemodynamics during diving and resurfacing.
So, the correct answer si option C.

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