I believe they are consumers.
I hope this helps you! :)
An organ is made of tissues. A tissue is made from multiple cells that carry out the same function, For example : a cardiac muscle is made from many cells of the same type. An organ whereas is made from group of tissues which have similar structure and functions.
I hope this helps.
Answer:
in the wall of the right atrium of the heart.
Explanation:
The sinoatrial node (SA), consisting of spindle-shaped cells, initiates the electrical activity of the heart. From its location in the right atrium in proximity to the superior vena cava, the electrical activity spreads to the atria, whose cells are larger than those of the SA.