Answer:
Enzymes
Explanation:
Enzymes are biological molecules that catalyze specific reactions.
Enzymes are organic proteins, and are catalysts for chemical reactions, meaning that they help to speed up the reaction.
They do this by lowering the amount of activation energy needed.
Mitosis is a step...which
further contains 4 steps each..
so the answer should be 4 steps..
mark brainliest if it helps
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.
