Fascinating Sign Language App -PC用

1. A few other vertebrates such as the koala (which has two opposable thumbs on each "hand" and fingerprints remarkably similar to human fingerprints) are often described as having "hands" instead of paws on their front limbs.

2. In other languages, the human hand is said to have five fingers, including the thumb as one of the fingers.

3. The heel of the hand is the area anteriorly to the bases of the metacarpal bones, located in the proximal part of the palm.

4. The human hand normally has five digits (four fingers plus one thumb).

5. Like other paired organs (eyes, feet, legs) each hand is dominantly controlled by the opposing brain hemisphere, so that handedness—the preferred hand choice for single-handed activities such as writing with a pencil, reflects individual brain functioning.

6. Some evolutionary anatomists use the term hand to refer to the appendage of digits on the forelimb more generally — for example, in the context of whether the three digits of the bird hand involved the same homologous loss of two digits as in the dinosaur hand.

7. Likewise the 10 digits of two hands, and the 12 phalanges of 4 fingers (touchable by the thumb) have given rise to number systems and calculation techniques.

8. Each human hand has five metacarpals and eight carpal bones.

9. There are five digits attached to the hand, notably with a nail fixed to the end in place of the normal claw.

10. The palm (Volar), which is the central region of the anterior part of the hand, located superficially to the metacarpus.

11. A hand is a prehensile, multi-fingered organ located at the end of the forearm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs.