Question

the three major parts of the circulatory system are the heart, the blood vessels, and the blood. the heart is an organ made of specialized cells. which function can the heart perform that individual heart cells cannot? using energy growing larger pumping blood producing waste

Explanation:

• Using energy: Individual heart cells use energy (e.g., through cellular respiration to power their activities like contraction at a basic level).
• Growing larger: Cells can grow in size (hypertrophy) as part of normal development or in response to certain stimuli. Individual heart cells can undergo growth - related processes.
• Pumping blood: Pumping blood is a complex, coordinated function. It requires the integrated action of multiple heart cells (cardiac muscle cells) working together in an organized structure (the heart organ). A single heart cell cannot pump blood on its own.
• Producing waste: Individual cells produce waste as a by - product of their metabolic processes (e.g., carbon dioxide from cellular respiration).

Answer:

pumping blood