Pretty sure it would be the nerves attatched to the heart valve
Probably to not contaminate food or accidentally poison it.
Answer:
cell B
Explanation:
You can see that cell B contains a chloroplast
Chloroplasts are the organelles responsable for photosynthesis, a process in which sugar is produced
The system that helps remove carbon from the body is the respiratory,the main organ that helps is the lungs c: