Anatomy Of The Heart And The Conduction System Flashcards Preview

A-Level PE Anatomy And Physiology > Anatomy Of The Heart And The Conduction System > Flashcards

Flashcards in Anatomy Of The Heart And The Conduction System Deck (14)
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1

What are the 4 parts of the conduction system

1. SA node
2. AV node
3. Bundles of his
4. Purkinje fibres

2

Which side of the heart is the tricuspid valve situated

The tricuspid valve is situated in the right side of the heart

3

Which side of the heart is the bicuspid valve situated

The bicuspid valve is situated in the left side of the heart

4

Where in the heart is the pulmonary semilunar valve situated

The pulmonary semilunar valve is situated between the right ventricle and the pulmonary artery

5

Where in the heart is the aortic semilunar valve situated in the heart

The aortic semilunar valve is situated between the left ventricle and the aorta

6

What is the circularity system called where the blood flows from the heart to the rest of the body

The systemic system

7

What is the circularly system called where the blood is pumped from the heart to the lungs and back

The pulmonary circuit

8

What is the first step of the conduction system

The SA node in the wall of the right atria sends an impulse across both atria causing atria systole

9

What is the second step of the conduction system

The AV node - in the middle of the wall between the atria and ventricles - receives the impulse from the SA node for, delays it for 0.1-0.2 seconds while atria systole to finish and then sends it down the bundles of his

10

What is the third step of the conduction system

The bundles of his - in the middle wall of the heart - send the impulse down to the bottom of the left and right side of the heart

11

What is the fourth step of the conduction system

The purkinje fibres - in the walls of the ventricles - use the impulse to penetrate the ventricle walls causing ventricle systole

12

What is systole

Contraction of the chamber walls

13

What is distole

Distole is the relaxation of the heart chambers

14

Define the conduction system

The conduction system consists of specialised bundles of tissue that transmit electrical impulses around the heart causing coordinated contractions

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