Education Journal
By Yan, Yip Din
“Alternative Conceptions on Excretion and Implications for Teaching”
Publisher: The Chinese University of Hong Kong
1/26
Pp. 101-115
1998
Type: Empirical
Data collection method: Interview
Number of subjects, range: Large — 31 or more
Grade and age of subjects: 9th-12 grade — under 17-18 years
- Undigested waste as an excretory product.
- Release of saliva was an excretory process.