The correct answer is endocardium.
The endocardium is termed as thin and smooth and is the innermost layer of the heart. Endocardium tissues are biologically and embryologically similar to endothelial cells which lines blood vessels.
It provides protection to valves and heart chambers. It is the muscular tissue which is responsible for contraction of the heart.
It also controls myocardial function. It acts as kind of blood-heart barrier and controls ionic composition of extracellular fluid where cardiomyocytes bathe.
Both are myelinated, however, the oligodendrocyte myelinates up to 40 axons and the schwann cells myelinates a section of one axon.
Answer:
im pretty sure there all correct im just not sure ab 2
Explanation:
You can either imagine it but it is spiral. Spiral is a coil or curl.
The biologist could use a DNA fingerprint of the frog - the biologist would accomplish this task by looking at the different codons that code for different phenotypes and gene sequence. By comparing the different codons, they can determine what species the frog belongs to.