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.
The central nervous system has two functions. One, where the brain is, is to be the center of thoughts and the interpreter of outside influences, while the spinal cord connects all parts of the body with the brain.
Answer:
gymnosperm and angiosperm
Explanation:
i got it right on the quiz
Double fertilization occurs in Angiosperms
Your skin has 3 layers. The top layer is called the epidermis. The middle layer is called the dermis. The bottom layer is called the subcutaneous fat.
