•what comprises the limbic system, endocrine system, sympathetic nervous system, peripheral nervous system & central nervous system.

Limbic system – group of structures that forms border around brain stem

Amygdala - Amygdala – emotion, connecting fear and anxiety

Hippocampus – memory

Endocrine system – group of glands that produce hormones to regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, mood

Pineal gland – produces melatonin, for sleep functions

Pituitary gland – hormones help with growth, sex organs, reproduction, metabolism

Other parts of endocrine system: thyroid gland, thymus, adrenal gland, pancreas, ovary/testis

Sympathetic nervous system – part of the autonomic nervous system most active in times of danger, called the “fight or flight” system

Peripheral nervous system – the input-output division of the nervous system messages carried by nerves sensory/afferent carry into central nervous systemmotor/efferent carry out of central nervous system branches within peripheral nervous system somatic nervous system (controls voluntary reactions)autonomic nervous system (regulates involuntary reactions)autonomic nervous system branches sympathetic nervous system (body becomes to expend energy) parasympathetic nervous system (concerned with increasing energy reserves)Central nervous system – the executive or decision-making component of the nervous system; takes information received from peripheral nervous system and attempts to process it so that adaptive reactions can be initiated spinal cord spinal reflexes (controls certain behaviors without requiring involvement from the brain)

they deliver oxygen to the blood