Senin, 06 Juli 2009

grade nine

The human excretory system consist of :
1. Urinary system
a. Kidneys
b. ureter
c. Bladder
d. Urethra
2. Skin
3. Liver
4. Lungs
You can click here to be more

Rabu, 25 Maret 2009

Grade 8 Respiratory

The respiratory system can download here

Grade 8

Human support and movement download

Growth and development

The growth and development of organism you can learn click here

Human blood

The human blood circulation system download here