Question

multiple choice question
the _ system is made up of the heart, blood vessels and blood.
o cardiovascular
o respiratory
o digestive
o lymphatic

Explanation:

The cardiovascular system consists of the heart (cardio - related to the heart), blood vessels, and blood. The respiratory system is for gas exchange (lungs, trachea etc.), the digestive system is for processing food (stomach, intestines etc.), and the lymphatic system is related to lymph fluid and immune function.

Answer:

cardiovascular