21 body parts in English:
1. Nostril: either of two external openings of the nose (नथुना)
2. Thumb: अंगूठा
3. Index finger: the finger next to the thumb; the forefinger (अंगूठे के पास की उंगली)
4. Ring finger: the finger next to the little finger, especially of the left hand, on which the wedding ring is worn (अनामिका)
5. Knuckle: a part of a finger at a joint where the bone is near the surface, especially where the finger joins the hand (उंगली का जोड़)
6. Ankle: the joint between your leg and your foot (टखना)
7. Shin: the front of the leg below the knee (पिंडली)
8. Calf (muscle): the fleshy part at the back of a person's leg below the knee
9. Heel: एड़ी
10. Foot: पांव (Remember: Leg = टांग)
11. Toe: पैर की उंगली
12. Palm: हथेली
13. Wrist: कलाई
14. Elbow: कोहनी
15. Shoulder: कंधा
16. Tongue: जीभ
17. Waist: कमर
18. Chest: छाती
19. Thigh: जांघ
20. Cheek: गाल
21. Chin: ठोड़ी / ठुड्डी