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.
Because we aren’t animals
It is made of lipids bound together called phospholipids and it is located in the plant cell and it it semipermeable meaning it can allow and reject
Answer: if change happens naturally in an ecosystem it will be better evolved to handle it. But at the expense it happens very slowly
Explanation: my answer
