A collection of glands found throughout the body that manufacture and secrete hormones into the bloodstream in order to effect behavioral change or maintain normal bodily functions is called the system.

The Endocrine System.

Explanation:

The endocrine system is composed of various endocrine glands and like other glands, they release(secrete) useful substances. Some exocrine glands deliver their secretion via ducts, but endocrine does theirs through hormones. These hormones which are chemical substances are secreted in response to various stimuli(both internal and external). They target their effects on certain organs known as target organs.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.