The arrows indicate the flow of air in of the human body through the respiratory system organs. In the above diagram, the air at first enters through the nose, then flows through the nasal cavity, pharynx, larynx, trachea, and then into the lungs through the Bronchi.
The endocrine system gets some help from organs such as the kidney, liver, heart and gonads, which have secondary endocrine functions. The kidney, for example, secretes hormones such as erythropoietin and renin.
In humans, it is roughly the size of an almond. The hypothalamus regulates certain metabolic processes and other activities of the Autonomic Nervous System. It synthesizes and secretes neurohormones, often called hypothalamic-releasing hormones, and these in turn stimulate or inhibit the secretion of pituitary hormones.The hypothalamus controls body temperature, hunger, thirst, fatigue, anger, and circadian cycles.n humans, it is roughly the size of an almond. The hypothalamus regulates certain metabolic processes and other activities of the Autonomic Nervous System. It synthesizes and secretes neurohormones, often called hypothalamic-releasing hormones, and these in turn stimulate or inhibit the secretion of pituitary hormones.