It is called cell differentiation this makes embryonic cells would become specialized cells. This occurs threw a process that is called gene expression
Answer:
the first option is correct (true)
It can be either diffusion, osmosis or active transport. depending on what is transported and how in which net direction they're moving.
B, hormones that serve as chemical messengers im not 100% sure though
Answer:
Endocardium
Explanation:
The endocardium makes the innermost lining of the wall of the heart. It is present over the thin layer of connective tissue. The function of the endocardium is to provide a smooth lining for the chambers of the heart. The valves present in the heart also have endocardium. The dense connective tissue of the heart valves is covered by endocardium.
The presence of the smooth endocardium made up of endothelium reduces the surface friction as blood passes through the heart. The endocardium of heart chambers is continuous with the endothelial lining of the large blood vessels that are attached to the heart.
