This document discusses three diseases that affect the skeleton: rickets, polio, and osteoporosis. Rickets is caused by a vitamin D deficiency and causes the legs to form an O or X shape. Polio is caused by a virus but can be prevented through immunization. Osteoporosis is caused by a calcium deficiency and can be prevented by drinking milk.

1. PENYAKIT RANGKA
RAKHITIS, POLIO DAN OSTEOPOROSIS
ITU 3 CONTOH PENYAKIT PADA
RANGKA
RAKHITIS KARENA KEKURANGAN
VITAMIN D
SEHINGGA KAKINYA MEMBENTUK
HURUF O DAN X

2. KALAU POLIO ITU KARENA
VIRUS
DAPAT DICEGAH DENGAN
IMUNISASI

3. OSTEOPOROSIS KEKURANGAN
KALSIUM
DAPAT DICEGAH DENGAN
MINUM SUSU