I think it's the Pancreas
Answer:
The correct answer is a. They release their secretions into the blood.
Explanation:
Endocrine glands are responsible for producing/secreting hormones and releasing them directly into the blood from where they travel to tissues and organs throughout the body. Some examples of endocrine glands are the pituitary gland (it regulates homeostasis), the thyroid gland (It helps to regulate growth and metabolism) and the adrenal glands (they perform different functions at the endocrine and nervous level).
