Respiratory System

The respiratory system provides oxygen for the body to live and thrive.  When we inhale we take oxygen in through our nose or mouth.  Some pathogens or toxins are filtered out through the nose.  It travels down through the trachea to the lungs.  The oxygen moves through the bronchi tubes within the lungs until it reaches the alveoli, small sacs, where the oxygen is transported into the blood vessels and is carried to the heart.  As we exhale the carbon dioxide in our system is expelled out of our body.

The lungs are found behind the rib cage in the chest.  They are broken down into three sections on the right, upper, mid, and lower.  The left side only has two sections due to the space required for the heart.  The diaphragm is a muscle that’s attached underneath the lungs.  When it contracts air is drawn into the lungs and when it extends the air is released.


Aromatherapy and herbs can be beneficial to the respiratory system.


Digestive System

The digestive system processes the food and is also known as the alimentary canal or gastrointestinal tract (GI tract).  Digestion of food starts with the mouth.  The tongue and teeth mechanically break down food with the help of enzymes.  The amylase, digestive enzyme, in the mouth breaks down mostly carbohydrates.  When the food is swallowed it goes down the esophagus to the stomach.

In the stomach, hydrochloric acid continues to break down the food, especially any protein.  As the food leaves the stomach, it’s called chyme.  It’s then transported into the small intestines where most of the nutrient absorption occurs.

In the small intestines, bile from the gall bladder and lipase from the pancreas digest the fats.  Amylase from the pancreas digests the rest of the carbohydrates.  And, trypsin from the pancreas further digests proteins.  The food goes from being some sort of solid substance before it enters the mouth to a smoothie consistency in the small intestines.  The nutrients are absorbed and go to the liver for filtration and distribution.

The last part of the journey is through the large intestines, also known as the colon.  The main function of the colon is to reabsorb water and electrolytes.  Once the liquid has been removed it moves down into the rectum and is excreted through the anus.


Aromatherapy can help the digestive system.  There are also herbs for the stomach, small intestines, colon, and liver.

Cardiovascular System

The cardiovascular system pumps the blood throughout the body.  One function of the blood is to deliver and remove substances from the body.  The red blood cells transport oxygen to the cells of the body.  The white blood cells take care of toxins and inflammation in the body.  The blood also protects the body by clotting, helps regulate PH and body temperature.

This system includes the heart and blood vessels.  The heart has four chambers.  The right atrium receives deoxygenated blood from the body.  The right ventricle pumps this blood to the lungs.  The left atrium receives oxygen rich blood from the lungs.  The left ventricle pumps the oxygen rich blood out to the body.  With every beat of the heart blood is pumped throughout the body through the blood vessels.  The heart is found behind the rib cage on the left side.  This muscle is encased in dense layers of tissue for protection and support.

There are four different blood types: type A, type B, type AB, and type O.  In order to receive a blood transfusion, the blood must be compatible.  Type O is known as the universal donor and can donate to any other type.  A type AB person can receive blood from any blood type and is known as the universal recipient.


cardio system

cardiovascular system

Aromatherapy and herbs can be beneficial to the cardiovascular system.

Endocrine System

The endocrine system consists of glands that secrete substances into the blood stream such as hormones.  These hormones are either categorized as proteins or steroids.  The organs of the endocrine system are found in various places within the body.

The pineal gland, hypothalamus, and pituitary gland are found in the brain.  The pineal gland produces and secretes melatonin which can make you feel sleepy.  This gland also regulates your bodies natural sleep cycle called circadian rhythms.  The hypothalamus controls hunger, thirst, fluid balance, and regulates the pituitary gland.  The anterior pituitary gland or front part, produces thyroid stimulating hormone TSH, growth hormone GH, an adrenal hormone (adrenocorticotropic) ACTH, and two reproductive hormones (follicle-stimulating) FSH and luteinizing hormone LH.  The posterior pituitary or the back part, creates oxytocin and antiduiretic hormone (ADH).

The thyroid, parathyroid, and thymus are found in the upper chest.  The thyroid receives the TSH from the pituitary and produces triiodothyronine (T3), thyroxine (T4), and calcitonin.  These hormones control growth, metabolism, and the amount of calcium in the body.  The parathyroid produces its own hormone PTH which increases calcium in the body.  The thymus produces thymosin which strenthens the immune system.

The pancreas and adrenal glands are found in the mid abdomen area.  The pancreas secretes glucagon and insulin to help with blood sugar.  The adrenal galnds produce cortisol, epinephrine, and norephinephrine that aid in the bodies stress response as well as estrogens.

The gonads or male and female reproductive organs are found in the lower abdomen.  The ovaries in the female produce estrogen and progesterone.  The testes in the male produce testosterone.


endocrine system

Aromatherapy and herbs can be beneficial to the endocrine system.



Nervous System

The nervous system is the bodies communication system.  Nerve impulses travel to and from the brain along nerve fibers called neurons.  There are two parts to the nervous system: the central nervous system that consists of the brain and spinal cord and the peripheral nervous system which is basically everything else.  The peripheral nervous system is divided into the somatic and autonomic systems.  The somatic nervous system aids with voluntary movements such as when you move your arm to scratch your head.  The autonomic nervous system is involuntary or that which we don’t have control over.  The autonomic system is divided into sympathetic and parasympathetic.  The sympathetic nervous system controls the fight or flight response.  The parasympathetic nervous system brings the body back to rest and relaxation.

nervous system chart

The nervous system is made up of neurons or nerve cells.  Each nerve cell has a cell body that houses the nucleus and produces protein.  The dendrites of a neuron receive information from the body and send it to the nucleus.  And, the axon takes the information and sends it to the organs and tissues.  Some axons are covered in fatty sheathes called myelin that speed up the transmission of the impulse.




Aromatherapy and herbs can be beneficial to the nervous system.  There are also herbs specific for the adrenals.




The thorax includes bones of the rib cage or chest as well as the clavicle.  It provides protection for the lungs and heart.  There are twelve pairs of ribs.  The first seven are true ribs because they attach to the sternum at the center of the chest.  The next three pairs are false ribs because they don’t reach the sternum, they’re joined together by cartilage that attaches them to the sternum.  The last two pairs of ribs are floating ribs because they aren’t attached in the front.