Somatic Nervous System
(SNS)

Autonomic Nervous System
(ANS)

Sympathetic Division

Parasympathetic Division

Endocrine System

Hypothalamus

Thyroid

Parathyroid

Thymus

Adrenal

Pancreas

Ovaries

Testes

Hormones

Gonads

Androgens

Estrogens

Estrus

Pituitary Gland

Growth Hormone