Venus fly traps, pitcher plants, and sundews all consume insects, but thats not how they get their energy. They still get their energy from the sun and transform it into food (such as sugars) using photosynthesis. They use the dead insects for their nutrients. ... So a Venus fly trap takes in CO2 from the air.
The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.
