heart structure and_function
TRANSCRIPT
![Page 1: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/1.jpg)
www.clickbiology.comwww.clickbiology.com
Heart Structure
![Page 2: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/2.jpg)
www.clickbiology.com
Blood travels through the heart twice before returning to the body
The double circulatory system
![Page 3: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/3.jpg)
www.clickbiology.comwww.clickbiology.com
•Why do we say that humans have a ‘double circulation’?• Amphibians and fish have a
‘single’ circulation system. What do you think this means?
![Page 4: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/4.jpg)
www.clickbiology.comwww.clickbiology.com
• The cardiac muscle cells are said to be ‘MYOGENIC’ i.e. they does not need electrical impulses from a nerve to make them contract. If the cardiac muscle is supplied with oxygen and nutrients (a task carried out by the coronary arteries which you can see running over the surface of the heart) it will continue to contract at a steady pace.
![Page 5: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/5.jpg)
www.clickbiology.comwww.clickbiology.com
External view of the heart
pulmonary artery
pulmonary vein
coronaryartery
left ventricle
right ventricle
inferior vena cava
right atrium
pulmonary vein
aorta
superiorvena cava
![Page 6: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/6.jpg)
www.clickbiology.comwww.clickbiology.com
The vena cava carries deoxygenated blood from the body to the right atrium
superior vena cava(transports blood from the head)
inferior vena cava(transports blood from rest of body)
![Page 7: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/7.jpg)
www.clickbiology.comwww.clickbiology.com
The right atrium collects deoxygenated blood and pumps it to the right ventricle
right atrium
![Page 8: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/8.jpg)
www.clickbiology.comwww.clickbiology.com
The right ventricle pumps deoxygenated blood to the lungs
right ventricle
![Page 9: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/9.jpg)
www.clickbiology.comwww.clickbiology.com
The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs
aorta
![Page 10: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/10.jpg)
www.clickbiology.comwww.clickbiology.com
The septum separates the left and right sides of the heart
septum
![Page 11: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/11.jpg)
www.clickbiology.comwww.clickbiology.com
The pulmonary veins carry oxygenated blood from the lungs to the left atrium
Pulmonary veins
![Page 12: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/12.jpg)
www.clickbiology.comwww.clickbiology.com
The left atrium collects the oxygenated blood and pumps it to the left ventricle
Left atrium
![Page 13: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/13.jpg)
www.clickbiology.comwww.clickbiology.com
The left ventricle pumps oxygenated blood to the body via the aorta
Left ventricle
![Page 14: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/14.jpg)
www.clickbiology.comwww.clickbiology.com
The aorta carries the oxygenated from the left ventricle to the rest of the body
Aorta
Aortic arch
![Page 15: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/15.jpg)
www.clickbiology.comwww.clickbiology.com
Atrio-ventricular valves prevent backflow of blood into the atria when ventricles contract
Bicuspid valve(mitral valve)
Tricuspid valves
Tendon
![Page 16: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/16.jpg)
www.clickbiology.comwww.clickbiology.com
The semi-lunar valves prevent backflow of blood from the arteries into the ventricles
Aortic semi-lunar valve
Pulmonarysemi-lunar valve
![Page 17: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/17.jpg)
www.clickbiology.comwww.clickbiology.com
Summary Quiz
Identify the part of the heart indicated by an arrow .There are 10 questions in total.
![Page 18: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/18.jpg)
www.clickbiology.comwww.clickbiology.com
Question 1
![Page 19: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/19.jpg)
www.clickbiology.comwww.clickbiology.com
Question 2
![Page 20: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/20.jpg)
www.clickbiology.comwww.clickbiology.com
Question 3
![Page 21: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/21.jpg)
www.clickbiology.comwww.clickbiology.com
Question 4
![Page 22: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/22.jpg)
www.clickbiology.comwww.clickbiology.com
Question 5
![Page 23: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/23.jpg)
www.clickbiology.comwww.clickbiology.com
Question 6
![Page 24: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/24.jpg)
www.clickbiology.comwww.clickbiology.com
Question 7
![Page 25: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/25.jpg)
www.clickbiology.comwww.clickbiology.com
Question 8
![Page 26: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/26.jpg)
www.clickbiology.comwww.clickbiology.com
Question 9
![Page 27: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/27.jpg)
www.clickbiology.comwww.clickbiology.com
Question 10
![Page 28: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/28.jpg)
www.clickbiology.comwww.clickbiology.com
Answers1 left ventricle2 vena cava3 right atrium4 pulmonary artery5 aorta6 pulmonary vein7 left atrium8 atrio-ventricular (tricuspid) valve9 semi-lunar (aortic) valve10 right ventricle
![Page 29: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/29.jpg)
An ECG – or electrocardiogram - is a simple and useful test which records the rhythm and electrical activity of your heart.
![Page 30: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/30.jpg)
Click up hereThis will only work if you are watching this as a slide show
![Page 31: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/31.jpg)
![Page 32: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/32.jpg)
![Page 33: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/33.jpg)
QRS = Ventricular systole
P = Atrial systole
T= Ventricular diasole
![Page 34: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/34.jpg)
The ECG can:
• Assess your heart rhythm• Diagnose poor blood flow to the heart muscle
(ischemia)• Diagnose a heart attack• Evaluate certain abnormalities of your heart,
such as an enlarged heart
![Page 35: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/35.jpg)
• Trace the flow of blood through the heart, identifying the major blood vessels, chambers and heart valves
![Page 36: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/36.jpg)
• Describe and explain the normal ECG cycle. Explain the events of the cardiac cycle and say how these relate to the heart sound
![Page 37: Heart structure and_function](https://reader034.vdocuments.us/reader034/viewer/2022052506/557c25d1d8b42a925b8b4e7d/html5/thumbnails/37.jpg)
www.clickbiology.comwww.clickbiology.com
Finish