The cardiac cycle and conduction system

Descrição

AS level Physical Education (PE) Slides sobre The cardiac cycle and conduction system, criado por sidney frankham em 10-04-2017.
sidney frankham
Slides por sidney frankham, atualizado more than 1 year ago
sidney frankham
Criado por sidney frankham mais de 7 anos atrás
9
1

Resumo de Recurso

Slide 1

    The cardiac cycle and conduction system
    The Sino-atrial node located in the right atrial wall generates the electrical impulse and fires it through the atria walls causing them to contract. The SA node is he pacemaker and the firing rate will determine heart rate.
    When the atria walls contract it forces the remaining blood from the atria from diastole into the ventricles. (Atrial systole.)

Slide 2

    The cardiac cycle and conduction system
    The Atrio-ventricular node collects the impulse and delays it for 0.1 seconds approx. to allow the atria to finish contracting. it the releases the impulse to the Bundle of His.The Bundle of His ,located in the septum, splits the impulse in two, ready to be distributed through each separate ventricle.The bundle branches carry the impulse to the base of each ventricle.The Purkinje fibres then distribute the impulse through the ventricle walls causing them to contract.
    The ventricles contract increasing the pressure closing the atrio-ventricular valves to prevent back flow into the atria.The semi-lunar valves are forced open as blood is ejected from the ventricles into the aorta and pulmonary artery.(Ventricular systole)

Slide 3

    The cardiac cycle and conduction system.
    Once the impulse' journey is complete, the atria and ventricles relax and the heart re-fills with blood. This process signifies one heartbeat.
    As the atria and the ventricles relax, they expand drawing blood into the atria. The pressure in the atria increases opening the Atrio-ventricular valves causing blood to passively enter the ventricles. The semi -lunar valves are closed to prevent blood from leaving the heart.(Diastole) 

Semelhante

Unit 4: The Respiratory and Circulatory Systems
Cath Warriner
Unit 2: Factors Affecting Performance
Cath Warriner
Unit 4: Respiratory and Circulatory System
Cath Warriner
Muscular-Skeletal systems
Camilla Donaldson
Respiratory system-responses and adaptations
Camilla Donaldson
Renal System A&P
Kirsty Jayne Buckley
Human Anatomy Final
cierarosebernal3
Anatomy and physiology
kristenfinkas
Endocrine diseases
Anna4anatomy
The Endocrine System Quiz
Cassandra Bilodeau
Unit 1: Anatomy and Physiology Test
Luke Brewster