A gland is an organ in the body that synthesizes substances such as hormones, enzymes, and sweat, and releases them for use elsewhere in the body or for elimination from the body. There are several types of glands in the human body, including exocrine glands, endocrine glands, and sweat glands.
Types of Glands
Exocrine Glands: These glands secrete their products into ducts that carry the secretions to the surface of the body or into body cavities. Examples of exocrine glands include sweat glands, salivary glands, and mammary glands.
The student demonstrates an understanding of how science explains changes in life forms over time, including genetics, heredity, the process of natural selection and biological evolution by showing the relationship between physical characteristics of Alaskan organisms and the environment in which they live.