Which of the following choices shows the layers of the heart from the innermost layer to the outermost layer

Explanation:

The heart is one of the organs that makes up the circulatory system in the human body.

Activities here ensures that blood moves through arteries, veins and capillaries round the body.

The layers of the heart from inside out include;

Endocardium - Innermost Epithelial Layer

Myocardium - Muscular Middle Layer

Pericardium - Visceral (Epicardium) Layer- innermost layer of the pericardium

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8