Ectothermic animals

A) depend on heat from the external environment to adjust their body temperatures.
B) may dilate blood vessels to increase blood flow and heat to the skin.
C) maintain a relatively constant body temperature despite external temperatures.
D) may have feathers to keep them insulated.
E) may have body fat to keep them insulated.

Ectothermic Animals

Organisms that regulate their body temperature through external sources, unable to internally maintain a constant body temperature.

External Environment

The conditions, entities, and factors surrounding and affecting an organism or system outside of its immediate physical location.

Body Temperature

The measure of the body's ability to generate and get rid of heat, necessary for maintaining metabolic processes.