Which of the following statement is correct?
A.
Salivary glands in mammals are endocrine glands.
B.
Parotid duct opens into the oral cavity, at cheek mucosa opposite the upper first molar.
C.
The liver is mainly located in the left upper quadrant of the abdominal cavity.
D.
Pancreas is a gland organ in the digestive and endocrine system.
E.
The major function of bile is to break down proteins.