1. Crocodiles can't stick out their tongues because their jaws are too long.

Giraffes don't cough because their vocal cords are special. There is a shallow groove in the middle of its vocal cords, which is not easy to make sound; Moreover, the lungs, chest and diaphragm are needed to make a sound, but because the giraffe's neck is too long and the distance between these organs is too far, it takes a lot of effort to make a sound.

Snakes can't blink, because the snake head has no muscles that can make eyes turn, and snakes don't have eyelids that can stretch up and down like people.

The tortoise has no teeth at all. Instead, they have beaks as sharp as birds and strong ridges that imitate teeth.

5. Cows have no front teeth.

6. The surface of a cat's tongue is covered with tiny papillae, which feels like sandpaper when touching the skin.

7.lizard, its tongue is blue

8. Goose's tongue is serrated and looks like teeth, which can help them contain food in their mouths.

9. The horizontal pupil of a goat is rectangular.

10. The shrimp's heart is on its head.