In this slideshow this will explain the cardiac cycle, the systemic circulation,pulmonary circulation and also whats associated with the heart.

1. Blood Circulation
Through the Heart
P4
Explain the physiology of 2 named body
systems in relation to energy metabolism in
the body

2. Starter Music Video
Check this out
ya’ll!

3. Activity I : Blood Circulation
• Find a diagram of the heart with the following
facets to it:-
– The Pulmonary Artery (Right and Left)
– Right and Left Ventricle
– Atrium
– Pulmonary Veins
– Aorta
– Vena Cava
• Now Describe the circulation (as per page 220)

4. Activity II: Questions
• Explain in a paragraph what the
following means:-
–Double Circulation
–Pulmonary Circulation
–Systematic Circulation

5. The Cardiac Cycle
The chambers of the heart
alternately contract and relax in a
rhythmic cycle.
• During the period of contraction
(systole), the heart pumps blood
out through the arteries; during
the period of relaxation (diastole),
the heart fills with blood.
• One complete sequence of filling
and pumping blood is called a
cardiac cycle, or heartbeat.

6. Fibrillation

7. Electrical Activity of the Heart
• The heart's rhythm of contraction is
controlled by the sinoatrial node (SA
node), often called the pacemaker. This
node is part of the heart's intrinsic
conduction system, which is made up of
specialized myocardial cells called nodal
cells.

8. Electrical Activity of the Heart
• The heart will beat without input
from the nervous system and will
continue to beat, even outside the
body, as long as its cells are alive.
• The automatic nature of the
heartbeat is referred to as
automaticity.
• Automaticity is due to the
spontaneous electrical activity of
the SA node. Electrical impulses
generated from the SA node
spread through the heart via a
nodal tissue pathway that
coordinates the events of the
cardiac cycle

9. Heart Pump Operation
• The activity of the conduction
system, muscles, and valves of
the heart are synchronized so
that the heart can operate as a
pump.
• The conduction system initiates
and coordinates the muscular
activity of the heart.
• Pressure differentials that result
from muscle activity actuate the
opening and closing of valves.
• The opening and closing of valves
directs the flow of blood through
the heart.

10. Activity III : The Cardiac Cycle
• Write down the stages of the cardiac cycle in yu
own words using pictures as well. Ad additional
information to personalise your work.
6 Steps
As per page 221

11. Activity IV : Organisation
• Explain ORGANISATION (as per the diagram
on the previous pages on this PowerPoint that we
looked at).
As per organising the heartbeat
(page 222)Use a diagram similar to the one in
the book to help you explain this...

12. What is heart rate?
What is and stroke volume?

13. Blood Pressure
Video

14. High Blood Pressure

15. Activity VI : Rate/Volume/Pressure
• Write up the remaining heart components:-
– Heart Rate
– Stroke Volume
– Blood Pressure
• Systolic
• Diastolic
• Make sure you define all the words and
include examples. Also, include a piece
about high blood pressure.

16. Plenary Activity