Unlike an animal's habitat, an animal's niche can be described by all of the following except a. the job the organism has within its environment. b. the way the species obtains what it needs to reproduce. c. the way the species obtains what it needs to survive. d. the place in which the species lives.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.