Sepetiniz boş
The correct sitting posture
People often spend up to 8–9 hours sitting each day; therefore, it is extremely important to learn the correct sitting posture.
01:52
Biyoloji
8 – 12. sınıf
Etiketler
mozaLink
/Web bağlantısı
People often spend up to 8–9 hours sitting each day; therefore, it is extremely important to learn the correct sitting posture.
01:52
Biyoloji
8 – 12. sınıf
Etiketler
mozaLink
/Web bağlantısı