Which of the following is not an endocrine gland?

Q. Which of the following is not an endocrine gland?

1. Pituitary
2. Spleen
3. Thyroid
4. Adrenal

Answer: Spleen

Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands. The hypothalamus and pituitary gland are neuroendocrine organs.

Major endocrine organs

1. Pituitary gland
2. Thyroid gland
3. Parathyroid glands
4. Adrenal glands
5. Pancreas
6. Gonads
7. Pineal gland
8. Other hormone-producing structures

Endocrine glands
The major endocrine glands: 1 Pineal gland 2 Pituitary gland 3 Thyroid gland 4 Thymus 5 Adrenal gland 6 Pancreas 7Ovary (female) 8 Testis (male)

The spleen is part of your lymphatic system, which fights infection and keeps your body fluids in balance. It contains white blood cells that fight germs.
The spleen is the largest organ in the lymphatic system.