This month, we’ll explore the endocrine (hormonal) system, a network of glands and organs spread throughout your body and brain, responsible for your proper development and functioning.
Endocrine glands produce and release hormones directly into your bloodstream while monitoring their levels. The following are some of the main glands and organs of your endocrine system.
Your hypothalamus is the primary connection between your hormonal and nervous systems. Its primary role is to maintain your body’s stability and balance (homeostasis). It works closely with your autonomic (automatic) nervous system, which controls unconscious functions such as temperature, blood pressure, heart rate, hunger, thirst, sex drive, mood, and sleep cycles. It produces dopamine and interacts with all your glands, organs, and hormones to regulate your body-brain functions. It’s connected to and communicates with your pituitary gland.
Under the control of the hypothalamus, your pituitary gland signals the thyroid and adrenal glands when to secrete their hormones, and controls your autonomic (automatic) nervous system. It produces and releases numerous vital hormones responsible for growth, metabolism, appetite, cortisol production in stress response, water and sodium (salt) balance, childbirth, and breastfeeding.
Situated in the center of your brain, your pineal gland controls your circadian rhythm – your sleep-wake cycles – by producing and releasing melatonin, the hormone that signals your body it’s time to sleep. It acts as your internal clock, responding to daylight and darkness. It controls the female menstrual cycle, hormones, digestion, and temperature, while also regulating your physiological, biological, psychological, and behavioural changes, shaping your 24-hour day-night cycle.
Your thyroid is a small gland that surrounds your windpipe on three sides at the front of your neck. This complex gland influences every cell and organ in your body. It produces and releases two main hormones, Thyroxine (T4) and Triiodothyronine (T3), which control your body’s metabolism; the process of converting food into energy. They also maintain energy levels, support digestion, cholesterol levels, breathing, muscle strength, growth and development, your central nervous system, while managing body weight, regulating temperature, and preventing bone loss. Because the thyroid gland is so complex, many things can go wrong with the gland itself, its hormones, the hypothalamus and pituitary glands, and in all the above-mentioned areas.
‘Our four feel-good hormones are dopamine, serotonin, oxytocin, and endorphins (…) Together, they evoke feelings of pleasure, happiness, and calm, while also balancing our minds and physical states and fostering a sense of belonging’
Divided into two sections, your adrenal glands sit on top of both your kidneys. The outer cortex produces aldosterone and cortisol, your chronic stress hormone. The inner medulla produces adrenaline and nor-adrenaline, your acute stress hormones. These hormones are activated every time you trigger a stress response. Their main tasks are to change your biology, physiology, psychology and behaviour during this response. These changes can put your body and mind on “alert” or into “attack mode.
Cortisol is your most potent chronic stress hormone that floods your brain and body when you trigger a chronic stress response. Over time, it floods your organs and glands, resulting in disruptions of normal functions, increasing inflammation leading to physical illness, and overwhelming your brain, resulting in mental illness. This is an example of when we cause our hormonal signalling to go wrong.
The adrenal glands influence your metabolism, immune system, digestive system, blood sugar levels, blood pressure, pregnancy, and the balance of other hormones, including oestrogen and testosterone, our sex hormones. These get disrupted, causing possible malfunctions when cortisol is in charge.
The thymus gland is behind your breastbone in front of your heart. Its primary function is to train white blood cells, known as T-lymphocytes or T-cells, that travel between bone marrow and the thymus to mature, eventually developing into specialised T-cells essential for the immune system to fight infections, bacteria, and toxins. They identify and attack antibodies and cancer cells, and help prevent autoimmune illnesses. The thymus also produces small amounts of melatonin to aid sleep, and insulin to control blood sugar levels, as well as thymosin, thymic humoral factor, thymopoietin and thymulin; all hormones that control your immune response.
Your pancreas is located below and behind your abdomen (stomach). Its main functions include producing the hormones insulin and glucagon, which regulate glucose (sugar) levels in the blood. It secretes fluids, along with bile, that break down food in your small intestine and assist in the metabolism of fats and proteins. It is responsible for controlling blood sugar levels and is a vital part of your digestive system. If the pancreas cannot produce insulin, conditions such as diabetes will develop.
Hormones are chemical messengers that travel between your brain and body to deliver instructions to specific cells, glands, and organs. They influence every cell, gland, and organ, helping to keep our organ systems and us functioning properly.
Additionally, our four feel-good hormones are dopamine, serotonin, oxytocin, and endorphins. Their primary function is to ensure the survival of our species, and therefore, our survival. These hormones assist us in areas such as movement, cognition, emotional processes, pleasure, mood, sleep quality, memory, digestion, appetite, immune support, wound healing, learning ability, pain relief, sexual desire, self-esteem, self-worth and confidence.
Together, they evoke feelings of pleasure, happiness, and calm, while also balancing our minds and physical states and fostering a sense of belonging.
They satisfy our needs for attachment, regulate our social behaviours, enhance empathy, build the emotional foundation for attraction and caregiving, relieve our pain, and influence our emotional responses – including how we interpret verbal and non-verbal cues – related to sexual and bonding behaviours. They motivate us to engage with others and form our most meaningful friendships and intimate relationships. They keep us in love, sexually attracted to our partners, and encourage us to create safe, stable environments for procreation and raising children.
Our endocrine system is designed to keep us functioning properly. Unfortunately, things do go wrong, and when they do, it’s essential to identify which glands, organs, and systems are malfunctioning and which hormones might be out of balance. Having a basic understanding of these simple things will help you get back on track.
