Mention three characteristics features of hormonal secretions in human beings.

The 3 characteristics of animal hormones are:

1. The animal hormones are secreted by the glands known as endocrine glands. The endocrine glands are ductless glands.

2. The animal hormones are secreted in small amounts. They are secreted directly into the blood.

3. Each hormone has its specific function which it performs. The timing and the amount of hormone released are regulated by a specific mechanism.