Question

How are endocrine glands classified?

Answer 1

in the endocrine system, the endocrine glands are the ductless glands that secrete their hormones, products directly into the blood. This endocrine system includes some major glands like the pituitary gland, adrenal gland, hypothalamus, ovaries, testes, pancreas, etc.

Complete answer:
In the interstitial fluids that are surrounded by the secretory cell’s hormones are secreted by endocrine glands instead of ducts and from the interstitial fluid’s hormones are spread into blood capillaries and then throughout the body blood carries them to the targeted cells.
In endocrine glands, many organs and tissues are not classified as endocrine glands but they include the cells which secrete some hormones and every hormone and gland included has their functions.

Other than those that are normally classified as endocrine gland many other body tissues contain tissues and secrete hormones like the gastrointestinal tract, placenta, kidneys, heart, skin.

Glands have their specific functions like hypothalamus helps in homeostasis, food, and water intake regulations, motor function control, pineal gland helps in secretion of melatonin hormone, regulation of endocrine glands, it is also responsible for sleepiness.
The parathyroid is the small tissues that release PTH and also help in regulating the calcium in the blood and thymus is located in the lungs and helps in regulating hormones like protein in maturation, adrenal glands secrete androgen which stimulates puberty ad

Note: Many other glands are there which are having a major contribution to the functioning of our body. to recognize a particular hormone, it only affects specific target cells with receptors, and regulations are increased or decreased by these hormone receptors.