The endocrine system is a collection of glands that secretes different types of hormones into the bloodstream. Thus helps in maintaining homeostasis throughout the body.
The adrenal glands are located in the superior of the kidneys. The pair of adrenal glands is made of two distinct layers and each with their own functions: outer adrenal cortex and inner adrenal medulla. Adrenal cortex produces mainly cortisol, aldosterone and androgens. Adrenal medulla produces epinephrine and norepinephrine.
The parathyroid glands are located on the posterior side of the thyroid gland. Parathyroid glands produce the hormone parathyroid hormone (PTH) consists of calcium ion homeostasis.
The thymus is found in the chest posterior to the sternum. The thymus produces the hormones thymosins that help regulate T-lymphocytes during fetal development to childhood. Thymus helped protect the body from harmful pathogens throughout a person’s life. During puberty thymus becomes inactive and as the person gets older the thymus becomes smaller and turns into fatty tissue.
The thyroid gland is located at the base of the neck. The thyroid gland is considered the largest endocrine gland. Thyroid gland produces three major hormones: calcitonin, triiodothyronine (T3), and thyroxine (T4).