GENERAL ANATOMY
ANATOMY OF THE HEART
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
composed of contractile proteins called actin And myosin
|
|
|
thicker in the ventricles than atria
|
|
|
Thicker in the left ventricle then the right ventricle
|
|
|
All of the above
|
Detailed explanation-1: -Which of the following is descriptive of the myocardium? Answer: D All the above.
Detailed explanation-2: -The muscles of the heart, termed the myocardium, make up the middle and thickest layer of the heart wall. This layer lies between the single-cell endocardium layer, which lines the inner chambers, and the outer epicardium, which makes up part of the pericardium that surrounds and protects the heart.
Detailed explanation-3: -The myocardium is mainly made up of two types of cells: cardiomyocytes and fibroblasts. Fibroblasts are distributed between cardiomyocytes, along with extracellular matrix (ECM), blood vessels, lymphatic vessels, and nerve endings.
Detailed explanation-4: -Cardiac muscle tissue, or myocardium, contains cells that expand and contract in response to electrical impulses from the nervous system. These cardiac cells work together to produce the rhythmic, wave-like contractions that is the heartbeat.
Detailed explanation-5: -The myocardium (cardiac muscle) is the thickest section of the heart wall and contains cardiomyocytes, the contractile cells of the heart.