Chemical Coordination and Integration

Oxytocin and ADH are produced by hypothalamus and are released from posterior pituitary gland.

Anterior pituitary secrete 6 hormones.

Pineal gland acts as biological clock.

Thymus gland is a primary lymphoid organ and differentiate lymphocytes to T-lymphocytes.

Peptide and polypeptide hormones such as oxytocin and vasopressin are water soluble hormones and are not soluble in lipid solution. Therefore, they cannot directly pass across the lipid bilayer of plasma membrane.