Why is the large intestine not considered a major excretory oran?

2 Comments

1. Pinky says:

   January 27, 2010 at 11:46 am

   because defecation is not an excretory process. all that is in your digestive tube is not considered literallly inside your body, so to be a "true" excretion, it has to be in your blood, tissues, so on.
2. gribbling says:

   January 27, 2010 at 11:46 am

   Defecation is technically "egestion", not excretion. You are just passing unused food material out your body – you are not actually excreting metabolic waste products.

   Metabolic waste products are removed from your body by your kidneys, and then your bladder and urethra. It is that system which performs excretion.