Use the drop-down menus to determine which structures of the endocrine system are described below. connects the endocrine system to the nervous system called the “master gland” of the endocrine system secretes a hormone that regulates sleep cycles regulates the development and differentiation of t lymphocytes

•Hypothalamus-connects the endocrine system to the nervous system.

It is a structure within the brain which secretes the hormones – releasing hormones which than stimulate or inhibit the secretion of hormones from the pituitary gland.

•Pituitary gland (hypophysis) - called the “master gland” of the endocrine system  

It is a three-lobe endocrine gland: The anterior pituitary (regulates growth, stress, reproduction), intermediate lobe (secretes melanocyte-stimulating hormone) and posterior pituitary (connection to the hypothalamus).

•Pineal gland - secretes a hormone that regulates sleep cycles.

Pineal gland is located in the epithalamus and it secretes melatonin hormone that regulates circadian and seasonal cycles.

•Thymus - regulates the development and differentiation of T lymphocytes

Thymus is a lymphoid organ of the immune system where the T lymphocytes mature.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.