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Title: Circulatory System
Description: A must-have resource for anyone looking to excel in biology, regardless of their level of expertise. Written by a top achiever who scored an A* in A-level Biology, this carefully crafted set of circulatory notes will help you navigate the fascinating world of life sciences with confidence. Whether you're just starting out or aiming to boost your knowledge, this comprehensive guide simplifies complex concepts and ensures you understand how the circulatory system works. The notes are organized in a way that guides you through the details of the circulatory system, covering important topics such as the heart, blood vessels, and blood components. Easy-to-understand diagrams and illustrations reinforce your learning and make complex processes easier to grasp. But what truly sets this resource apart is the author's personal experience of achieving an A* in A-level Biology. Drawing from their knowledge and insights, they provide valuable tips, exam strategies, and real-life examples to help you succeed in your assessments. By following their proven techniques, you'll gain the skills and confidence needed to tackle any circulatory system-related question.
Description: A must-have resource for anyone looking to excel in biology, regardless of their level of expertise. Written by a top achiever who scored an A* in A-level Biology, this carefully crafted set of circulatory notes will help you navigate the fascinating world of life sciences with confidence. Whether you're just starting out or aiming to boost your knowledge, this comprehensive guide simplifies complex concepts and ensures you understand how the circulatory system works. The notes are organized in a way that guides you through the details of the circulatory system, covering important topics such as the heart, blood vessels, and blood components. Easy-to-understand diagrams and illustrations reinforce your learning and make complex processes easier to grasp. But what truly sets this resource apart is the author's personal experience of achieving an A* in A-level Biology. Drawing from their knowledge and insights, they provide valuable tips, exam strategies, and real-life examples to help you succeed in your assessments. By following their proven techniques, you'll gain the skills and confidence needed to tackle any circulatory system-related question.
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Why do we need a circulatory system?
1) Small animals with a large surface area to volume ratio can rely on diffusion to
exchange oxygen, CO2 and nutrients with their environment
...
3) Circulatory system - transport fluids containing
nutrients, oxygen and waste
Single circulatory system
1) Blood passes through the heart once during one complete circuit of the body e
...
2) The heart only has one atrium and one ventricle
...
The gills are the gas exchange site
...
This results in the heart having a right and left side (separated by the septum)
...
3) Once blood has gone through the body, it
returns to the right side of the heart
...
The heart will pump blood, which
will travel through the dorsal vessel
...
3) Blood will surround the organs; it will eventually return to the heart via valves
called 'ostia'
...
Advantages of double circulation:
1) Double circulation maintains a higher blood pressure and average speed of flow
...
2) In a single circulatory system, blood has to go
through two capillary networks
...
3)
When blood enters a capillary network, the pressure and speed drops significantly
...
2) Closed: blood is always contained
within a network of vessels
...
4) Humans have closed, double-circulatory systems
...
Have a
narrow lumen
...
3) Tunica media: made up of smooth muscles and a thick layer of elastic tissue
...
Arteries will have thick media
...
4) Tunica externa: Exterior of the artery
...
What does the pulmonary artery do?
Carries deoxygenated blood to the lungs
What does the pulmonary vein do?
Carries oxygenated blood from the lungs to the right atria of the heart
Title: Circulatory System
Description: A must-have resource for anyone looking to excel in biology, regardless of their level of expertise. Written by a top achiever who scored an A* in A-level Biology, this carefully crafted set of circulatory notes will help you navigate the fascinating world of life sciences with confidence. Whether you're just starting out or aiming to boost your knowledge, this comprehensive guide simplifies complex concepts and ensures you understand how the circulatory system works. The notes are organized in a way that guides you through the details of the circulatory system, covering important topics such as the heart, blood vessels, and blood components. Easy-to-understand diagrams and illustrations reinforce your learning and make complex processes easier to grasp. But what truly sets this resource apart is the author's personal experience of achieving an A* in A-level Biology. Drawing from their knowledge and insights, they provide valuable tips, exam strategies, and real-life examples to help you succeed in your assessments. By following their proven techniques, you'll gain the skills and confidence needed to tackle any circulatory system-related question.
Description: A must-have resource for anyone looking to excel in biology, regardless of their level of expertise. Written by a top achiever who scored an A* in A-level Biology, this carefully crafted set of circulatory notes will help you navigate the fascinating world of life sciences with confidence. Whether you're just starting out or aiming to boost your knowledge, this comprehensive guide simplifies complex concepts and ensures you understand how the circulatory system works. The notes are organized in a way that guides you through the details of the circulatory system, covering important topics such as the heart, blood vessels, and blood components. Easy-to-understand diagrams and illustrations reinforce your learning and make complex processes easier to grasp. But what truly sets this resource apart is the author's personal experience of achieving an A* in A-level Biology. Drawing from their knowledge and insights, they provide valuable tips, exam strategies, and real-life examples to help you succeed in your assessments. By following their proven techniques, you'll gain the skills and confidence needed to tackle any circulatory system-related question.