What is common in the structure of all cloven-hoofed animals?

1. The limbs have hooves, the toes have an even number of 2/4, from the bottom 2 on the hoof.
2. Clavicles are missing.
3. Have a difficult stomach. (Not all types are straight, for there are exceptions.)
4. Breathe with the help of the lungs.
5. The heart is four-chambered, two circles of blood circulation, the circulatory system is closed.



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