30 compressions and 2 breaths
The epidermal layer of the skin or in sunlight it’s cholecalciferol
Answer:
Step 1
Superior and Inferior Vena Cava
Step 2
Right Atrium
Step 3
Tricuspid Valve
Step 4
Right Ventricle
Step 5
Pulmonary Semilunar Valve
Step 6
Pulmonary Artery
Step 7
Lungs
Step 8
Four Pulmonary Veins
Step 9
Left Atrium
Step 10
Mitral Valve
Step 11
Left Ventricle
Step 12
Aortic Semilunar Valve
Step 13
Aorta
Explanation: