Ace the ASCP Histotechnician Exam 2025 – Slice & Dice Your Path to Success!

Question: 1 / 400

What is the outer layer of the heart called?

Endocardium

Myocardium

Epicardium

The outer layer of the heart is called the epicardium. This layer serves as a protective covering for the heart and is also part of the pericardial sac, which includes the pericardium itself. The epicardium is composed of a layer of mesothelial cells that is underlined by connective tissue. It plays a crucial role in providing a smooth surface for the heart within the pericardial cavity, which reduces friction as the heart beats.

The endocardium is the inner lining of the heart chambers, providing a smooth surface for blood flow. The myocardium is the thick muscular layer responsible for the heart's contractile function. The pericardium, on the other hand, is the fibrous sac that encases the heart and contains the fluid that lubricates the heart's movement. Understanding these different layers and their functions is key to recognizing the structural composition of the heart.

Get further explanation with Examzify DeepDiveBeta

Pericardium

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy