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.
I think it's A. They have a cell membrane.
Hope this helps!
Grass and stuff they are herbivores
The answer is A, just took the test on edge
Answer:
amino acids are organic compunds.....