What is the Inner Most Layer of The Heart Wall Called?

This week’s edition of “mock question dissection” explores all three layer of the heart wall,

First, watch the 7-minute video tutorial and then test your knowledge using the extra mock questions at the bottom of this blog

With that said…

let’s take a look at today’s mock question to dissect.

What is the innermost layer of the heart wall called?

Comment below with your correct answer:

  • A. Myocardium
  • B. Pericardium
  • C. Periosteum
  • D. Endocardium

As we dissect this mock question I want to break the rest of this blog into 3 sections:

  1. Why the heart is similar to a house
  2. The three layers of the heart wall
  3. Answering today’s mock question

Also, I’ve placed 3 more fitness exam mock questions below.

All relating to the heart walls. These will help you become more confident in your knowledge and ready to tackle your final exam.

Let’s jump right into today’s revision session…

Why the heart is similar to a house…

Every house has:

  • Walls
  • Rooms
  • Doors
  • Electrical Supply

Similarly, your heart has:

  • Walls
  • Rooms (known as Chambers)
  • Doors (known as valves)
  • Electrical Supply

The three layers of the heart wall

Today we are talking about the walls of the heart, which are similar to the walls of your house.

Imagine the walls in your house, you have the cladding on the outside of your house walls, brick as the main bulk in the middle, and then plasterboard and plaster on the inside.

There are multiple layers, each having it’s own purpose and function

This is the same as in your heart.

There are three layers of the heart wall:

  • Epicardium
  • Myocardium
  • Endocardium

Let’s look at each one individually

The outer most layer is the Epicardium

This is similar to the cladding on the outside of your house walls. It is a visceral layer, made of a single layer of cells, fat and connective tissue

The name Epicardium can be split into two phrases- Epi (meaning the outermost or EPIC) and Cardium (meaning “of the heart”)

The middle layer is the Myocardium

This is the main “bulk” of your heart walls, it is much like the main “Brick” layer of the walls in your house. However, this layer is made of muscle.

The muscle is known as Cardiac muscle ( as it is only found in the heart). It is striated (which allows for a forceful contraction creating the heart contractions of each heartbeat. The muscle is also involuntary, which means we don’t need to voluntarily think about contracting the heart muscle, it happens automatically

The name Myocardium can be split into two phrases- Myo (meaning the muscle) and Cardium (meaning “of the heart”)

The Inner most layer is the Endocardium

This is similar to the plaster and plasterboard on the inside of your house walls. It lines the heart valves and chambers. It is made of epithelial cells and connective tissue

The name Endocardium can be split into two phrases- Endo (meaning the innermost) and Cardium (meaning “of the heart”)

Answering today’s mock question

What is the innermost layer of the heart wall called?

  • A. Myocardium
  • B. Pericardium
  • C. Periosteum
  • D. Endocardium

Based on the infromation detailed above, you should have the answer as D: Endocardium

Test your knowledge with more mock questions:

[NOTE: The answers are below the 3rd questions]

Q1: What is the outer most layer of the heart wall called?

A. Myocardium
B. Epicardium
C. Periosteum
D. Pericardium

Q2: What are the characteristics of the Myocardium?

A. Smooth Voluntary Muscle
B. Striated Voluntary Muscle
C. Striated Involuntary Muscle
D. Smooth Involuntary Muscle

Q3: What is the Endocardium?

A. The inner most layer of the heart wall
B. The outer most layer of the heart wall
C. The inner most layer of the muscle wall
D. The outer most layer of the muscle wall

Answers to the mock questions are :

Question 1= B, Question 2 = C, Question 3 = A

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Hayley “What is the Inner Most Layer of The Heart Wall Called?” Bergman

Parallel Coaching

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