Vitamin D is essential for the absorption of calcium from the small intestine. It helps to maintain normal blood calcium levels and promotes bone health.

The thyroid gland produces hormones that regulate metabolism, growth and development, and body temperature.

Insulin is a hormone produced by the pancreas that helps to regulate blood sugar levels by allowing glucose to enter cells for energy production.

Iodine is an essential component of thyroid hormones, and a deficiency can lead to hypothyroidism.

Epinephrine, also known as adrenaline, is produced by the adrenal glands in response to stress and helps to prepare the body for a fight-or-flight response.

The parathyroid glands produce parathyroid hormone, which helps to regulate blood calcium levels by increasing the absorption of calcium from the small intestine and bones.

Vitamin B12 is essential for the production of red blood cells and the synthesis of DNA.

The pancreas produces insulin and glucagon, which work together to regulate blood sugar levels.

Growth hormone is produced by the pituitary gland and is responsible for regulating growth and development in children and adolescents.

The hypothalamus produces hormones that stimulate the release of hormones from other endocrine glands, such as the pituitary gland.

Adrenocorticotropic hormone (ACTH) is produced by the pituitary gland and is responsible for regulating the release of hormones from the adrenal glands.

The adrenal glands produce hormones such as cortisol and adrenaline, which help the body respond to stress and regulate various bodily functions.

Vitamin C is essential for the absorption of iron from the small intestine.

The pineal gland produces melatonin, a hormone that helps to regulate the body's sleep-wake cycle.

Cortisol is a hormone produced by the adrenal glands in response to stress and helps to regulate the body's response to stress.