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Discover Your Body's Awesome Cardiovascular System

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Gas exchange in humans- blood vessels

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Animal organisation - transport systems

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The blood vessels

Discover Your Body's Awesome Cardiovascular System

The cardiovascular system is a complex network of blood vessels that transport blood throughout the body. This system plays a crucial role in delivering oxygen and nutrients to tissues while removing waste products.

Key points:

  • Three main types of blood vessels: arteries, capillaries, and veins
  • Each type of blood vessel has unique structural and functional characteristics
  • The heart works in conjunction with these vessels to maintain blood flow
  • Understanding the differences between these vessels is essential for comprehending cardiovascular physiology
...

2/11/2023

84

a Blood vessels Arteries: Blood direction: away from heart. Blood pressure: High. ↳narrow lumen, Lo contraction of left ventricle. wall thic

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Blood Vessels: Capillaries and Veins

This page discusses the structure and function of capillaries and veins, as well as their role in the cardiovascular system.

Capillaries:

Capillaries are the smallest blood vessels in the body, serving as the interface between the blood and tissue cells.

Definition: Capillaries are microscopic blood vessels that facilitate the exchange of substances between blood and surrounding tissues.

Structure of capillaries:

  • One cell thick wall for rapid diffusion
  • Small internal diameter lumenlumen
  • No valves

Function of capillaries:

  • Allow for exchange of oxygen, nutrients, and waste products between blood and tissues
  • Carry both oxygenated and deoxygenated blood

Highlight: The thin walls of capillaries are crucial for their function, allowing for efficient exchange of substances.

Veins:

Veins are blood vessels that return blood to the heart from the body's tissues.

Structure of veins:

  • Thinner walls compared to arteries
  • Larger lumen
  • Presence of valves to prevent backflow of blood

Function of veins:

  • Carry deoxygenated blood back to the heart exceptforpulmonaryveinsexcept for pulmonary veins
  • Maintain low blood pressure
  • Act as blood reservoirs

Example: The vena cava is a large vein that returns deoxygenated blood from the body to the right atrium of the heart.

Cardiovascular system anatomy and physiology:

The page also provides an overview of blood flow through the heart and major blood vessels:

  1. Deoxygenated blood flow: Vena cava → Right atrium → Right ventricle → Pulmonary artery → Lungs
  2. Oxygenated blood flow: Pulmonary vein → Left atrium → Left ventricle → Aorta → Rest of body

Vocabulary: Septum - The central wall of the heart that separates the right and left sides.

What are the 4 main arteries of the heart:

  1. Aorta: Carries oxygenated blood around the body
  2. Pulmonary artery: Takes deoxygenated blood to the lungs
  3. Pulmonary vein: Brings oxygenated blood from the lungs to the heart
  4. Vena cava: Brings deoxygenated blood from the body to the heart

Highlight: Understanding the structure and function of different blood vessels is crucial for comprehending the overall function of the cardiovascular system.

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Subjects

Biology

Organisation

Animal organisation - transport systems

The blood vessels

 

Biology

•

84

•

Feb 11, 2023

•

2 pages

Discover Your Body's Awesome Cardiovascular System

A

ayna

@aynna_ynkz

The cardiovascular system is a complex network of blood vessels that transport blood throughout the body. This system plays a crucial role in delivering oxygen and nutrients to tissues while removing waste products.

Key points:

  • Three main types of blood... Show more

a Blood vessels Arteries: Blood direction: away from heart. Blood pressure: High. ↳narrow lumen, Lo contraction of left ventricle. wall thic

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Blood Vessels: Capillaries and Veins

This page discusses the structure and function of capillaries and veins, as well as their role in the cardiovascular system.

Capillaries:

Capillaries are the smallest blood vessels in the body, serving as the interface between the blood and tissue cells.

Definition: Capillaries are microscopic blood vessels that facilitate the exchange of substances between blood and surrounding tissues.

Structure of capillaries:

  • One cell thick wall for rapid diffusion
  • Small internal diameter lumenlumen
  • No valves

Function of capillaries:

  • Allow for exchange of oxygen, nutrients, and waste products between blood and tissues
  • Carry both oxygenated and deoxygenated blood

Highlight: The thin walls of capillaries are crucial for their function, allowing for efficient exchange of substances.

Veins:

Veins are blood vessels that return blood to the heart from the body's tissues.

Structure of veins:

  • Thinner walls compared to arteries
  • Larger lumen
  • Presence of valves to prevent backflow of blood

Function of veins:

  • Carry deoxygenated blood back to the heart exceptforpulmonaryveinsexcept for pulmonary veins
  • Maintain low blood pressure
  • Act as blood reservoirs

Example: The vena cava is a large vein that returns deoxygenated blood from the body to the right atrium of the heart.

Cardiovascular system anatomy and physiology:

The page also provides an overview of blood flow through the heart and major blood vessels:

  1. Deoxygenated blood flow: Vena cava → Right atrium → Right ventricle → Pulmonary artery → Lungs
  2. Oxygenated blood flow: Pulmonary vein → Left atrium → Left ventricle → Aorta → Rest of body

Vocabulary: Septum - The central wall of the heart that separates the right and left sides.

What are the 4 main arteries of the heart:

  1. Aorta: Carries oxygenated blood around the body
  2. Pulmonary artery: Takes deoxygenated blood to the lungs
  3. Pulmonary vein: Brings oxygenated blood from the lungs to the heart
  4. Vena cava: Brings deoxygenated blood from the body to the heart

Highlight: Understanding the structure and function of different blood vessels is crucial for comprehending the overall function of the cardiovascular system.

a Blood vessels Arteries: Blood direction: away from heart. Blood pressure: High. ↳narrow lumen, Lo contraction of left ventricle. wall thic

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Blood Vessels: Arteries

Arteries are specialized blood vessels that carry blood away from the heart. They have several distinctive features that enable them to perform their function effectively.

Definition: Arteries are blood vessels that transport blood away from the heart under high pressure.

Structure of arteries includes:

  1. Thick walls with multiple layers: Muscular layer for contraction and dilation Elastic layer for withstanding pressure
  2. Narrow lumen internaldiameterinternal diameter creating high blood pressure

Highlight: The thick walls and narrow lumen of arteries are adaptations to handle the high pressure of blood ejected from the heart.

Function of arteries:

  • Carry oxygenated blood exceptforthepulmonaryarteryexcept for the pulmonary artery
  • Regulate blood flow through contraction and dilation of the muscular layer
  • Maintain blood pressure through elastic recoil

Vocabulary: Lumen - The internal space or cavity of a tubular structure, such as a blood vessel.

Arteries do not have valves, as the high blood pressure is sufficient to prevent backflow.

Example: The aorta is the largest artery in the body, carrying oxygenated blood from the left ventricle to the rest of the body.

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Brad T

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Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

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Sudenaz Ocak

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Greenlight Bonnie

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Marco B

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Elisha

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This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user