Question

how does the circulatory system ensure that all cells receive what they need? by removing waste products through excretion by producing energy through respiration by transporting necessary substances through blood circulation

Explanation:

The circulatory system's main function is to transport substances like oxygen, nutrients, and hormones to cells via blood circulation. Removal of waste is a secondary - related function, and energy production is mainly through cellular respiration not the circulatory system's direct role.

Answer:

By transporting necessary substances through blood circulation