Answer:
Answer is Sinoatrial node, SA.
Explanation:
The sinoatrial node, SA, is known to be a group of cells which are found at the top of the heart.
The electrical signal that is initiated by the sinoatrial node bring about or stimulates the atria and then the ventricle of the heart.
It should be noted that, the sinoatrial node are regarded as the pacemaker cells.
Many people hate shots and don't receive the vaccination, causing many illnesses spread around.<span />
igneous rock forms deepest in the earth
Answer:
Lactose contains a lot of processed sugars found in food sources such as milk, yogurt, and cheese.
A2
B4
C1
D3
I think sorry if I get one wrong
