Question

Structure of heart in fish ,frog, snake, crocodile and birds

Answer 1

Answer:

Fish have a single circuit for blood flow and a two-chambered heart that has only a single atrium and a single ventricle (figure a). ... The heart is three chambered, but the ventricles are partially separated so some mixing of oxygenated and deoxygenated blood occurs, except in crocodilians andbirds.

Explanation:

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