Answer:
I think viruses, bacteria,fungi and parasites.
Answer:
I am certain 2 of out 3 of these are part of it
Explanation:
I forgot if alveoli is part of it.
Answer:
The chyme, which is already a fecal bolus formed produces an involuntary stimulus reaching the colon that cause the defecation; The first step is the relaxation of the internal sphincter through the sacral nerve (involuntary), and then voluntarily the cerebral cortex through the pudendal nerves that relax the external sphincter.
