Changes

[[Image:Thyroid_crop.jpg|250px|thumb|right|'''The Thyroid gland appears to play an important role in [[Snake Shedding|shedding]] and growth''' - (Copyright © RVC)]]

[[Image:Thyroid_crop.jpg|250px|thumb|right|'''The Thyroid gland appears to play an important role in [[Snake Shedding|shedding]] and growth''' - (Copyright © RVC)]]

==Thyroid==

==Thyroid==

The single thyroid gland is roughly spherical and enclosed in a connective tissue capsule. It lies just cranial to the [[Snake Cardiovascular System|heart]] and ventral to the [[Snake Respiratory System|trachea]]. The thyroid, which is under pituitary control, appears to play an important role in [[Snake Shedding|shedding]] and growth. Accidental surgical removal of the thyroid may increase [[Snake Shedding|shedding]], which is the opposite reaction to the one in lizards. In some species it has been reported that thyroid extract administration inhibits moulting.

The single thyroid gland is roughly spherical and enclosed in a connective tissue capsule. It lies just cranial to the [[Snake Cardiovascular System|heart]] and ventral to the [[Snake Respiratory System|trachea]]. The thyroid, which is under pituitary control, appears to play an important role in [[Snake Shedding|shedding]] and growth. Accidental surgical removal of the thyroid may increase shedding, which is the opposite reaction to the one in lizards. In some species it has been reported that thyroid extract administration inhibits moulting.

==Thymus==

==Thymus==