the heart
TRANSCRIPT
![Page 1: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/1.jpg)
Lloyd Dean
The Heart
![Page 2: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/2.jpg)
The Heart Structure
• Size and Location
• 3 Layers of Heart Wall
Pericardium (Outer Layer) Reduce friction & maintain heart shape
Myocardium (Middle Layer) Largest layer and used in electrical impulse of heart
beat
Endocardium (Inner Layer)Prevent friction between flowing blood and heart muscle
![Page 3: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/3.jpg)
The Heart Structure
“Cardium” – Heart
“Peri” – On, around
“Myo” – Muscle
“Endo” – Within, Inward
![Page 4: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/4.jpg)
Heart Chambers
RIGHT ATRIUM LEFT
ATRIUM
RIGHT VENTRICL
E
LEFT VENTRICL
E
MUSCLE
![Page 5: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/5.jpg)
Septum – Divides the two sides of the heart preventing oxygenated blood mixing with deoxygenated blood.
Pulmonary Vein – Transports oxygenated blood to the heart.Aorta – Transports oxygenated blood away from the heart to the body.Vena Cava – Transports deoxygenated blood from the body back to the heart.Pulmonary Artery – Transports deoxygenated blood to the lungs.
AORTAPULMONARY VEIN
PULMONARY ARTERY
VENA CAVA
SEPTUM
![Page 6: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/6.jpg)
Valves in The Heart• 4 Valves in the heart
• Bicuspid Valve - Found between the left ventricle and the left atrium and prevents backflow of blood from the left ventricle to the left atrium. Also known as Mitrial valve.
• Tricuspid Valve - Found between the right ventricle and the right atrium and prevents backflow of blood from the right ventricle to the right atrium
• Aortic Valve - Found in the aorta. They prevent backflow of blood into the left ventricle.
• Pulmonary Valve – Found in the pulmonary artery and prevents backflow of blood into the right ventricle.
• How do the valves make sure that blood does not flow backwards?
Chordae Tendinae
![Page 7: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/7.jpg)
The Heart
![Page 8: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/8.jpg)
Blood Flow Through Heart
![Page 9: The heart](https://reader035.vdocuments.us/reader035/viewer/2022062513/55578b6bd8b42ad4278b4ea1/html5/thumbnails/9.jpg)
The Heart Structure and Function• How does the heart receive energy?
• With the person sat next to you describe and draw how blood flows through the heart
• The heart beats between 80,000 to 100,000 times and pumps approximately 23,000 litres of blood a day
• That means it will have beat 2-3 billion times and pumped 50-65 million gallons of blood over a 70-90 year lifespan
• Remember to look after it!