Podcast
Questions and Answers
Why is it recommended to multiply the number of heartbeats counted in 15 seconds by four?
Why is it recommended to multiply the number of heartbeats counted in 15 seconds by four?
- To approximate the number of times your heart beats in one minute. (correct)
- To calculate the average heart rate over an hour.
- To adjust for potential inaccuracies in pulse counting.
- To estimate the heart rate over a shorter time period.
Arteries carry oxygen-poor blood from the body to the heart.
Arteries carry oxygen-poor blood from the body to the heart.
False (B)
What is the primary function of veins in the circulatory system?
What is the primary function of veins in the circulatory system?
carry oxygen-poor blood to the heart
The hollow internal cavity within a blood vessel where blood flows is known as the ______.
The hollow internal cavity within a blood vessel where blood flows is known as the ______.
Match each blood vessel type with its correct description:
Match each blood vessel type with its correct description:
Which characteristic distinguishes arteries from veins?
Which characteristic distinguishes arteries from veins?
The pulmonary circuit involves blood flow between the heart and the brain.
The pulmonary circuit involves blood flow between the heart and the brain.
What type of muscle primarily composes the heart?
What type of muscle primarily composes the heart?
Oxygenated blood leaves the heart and enters the systemic circuit via the ______.
Oxygenated blood leaves the heart and enters the systemic circuit via the ______.
Which of the following best describes the function of capillaries?
Which of the following best describes the function of capillaries?
Arteries have valves to prevent the backflow of blood.
Arteries have valves to prevent the backflow of blood.
Describe the main difference between the systemic and pulmonary circuits.
Describe the main difference between the systemic and pulmonary circuits.
The ______ of an artery is thicker than that of a vein, which helps it withstand high pressure.
The ______ of an artery is thicker than that of a vein, which helps it withstand high pressure.
What is the primary reason veins have valves?
What is the primary reason veins have valves?
The heart has three chambers: two atria and one ventricle.
The heart has three chambers: two atria and one ventricle.
Flashcards
Blood vessels
Blood vessels
Channels that carry blood throughout the body.
Lumen
Lumen
The hollow space inside a blood vessel through which blood flows.
Artery
Artery
Blood vessels that carry oxygen-rich blood away from the heart to the body.
Vein
Vein
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Double Circulatory System
Double Circulatory System
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Pulmonary Circuit
Pulmonary Circuit
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Systemic Circuit
Systemic Circuit
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Cardiac Muscles
Cardiac Muscles
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Artery
Artery
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Capillary
Capillary
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Vein
Vein
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Right Atrium
Right Atrium
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Left Atrium
Left Atrium
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Right Ventricle
Right Ventricle
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Left Ventricle
Left Ventricle
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Study Notes
- To check your pulse, place your index and middle fingers on your wrist
- Count the beats for 15 seconds, and multiply by four to get your heart beats per minute
Circulatory System
- The circulatory system is being discussed
Learning Objectives
- The structure and function of the human heart will be described
- Types of blood vessels (arteries, veins, capillaries) will be differentiated
- Key parts of the human heart can be identified and labeled accurately
- The function of each part in blood circulation can be explained
- Arteries, veins, and capillaries can be compared and contrasted with examples
Key terms
- Blood vessels are channels that carry blood throughout the body
- Lumen refers to the hollow internal cavity in which blood flows
- Arteries are blood vessels which distribute oxygen-rich (oxygenated) blood to the entire body
- Veins are blood vessels that carry oxygen-poor (deoxygenated) blood to the heart
Double Circulatory System
- The heart is made of special cardiac muscles
- Oxygenated blood, pulmonary and systemic circuits are components
Blood Vessels
- Arteries have the thickest walls to withstand high pressure from the heart
- Capillaries have the thinnest walls so substances like oxygen and sugars can pass through
- Veins are less muscular and stretchy than arteries and have low pressure
- Veins have special valves
Arteries vs Veins
- Page 49 details describing the inside of the heart
- Veins have valves but arteries do not
- Page 48 contains types of blood vessels
- Complete a table comparing the structure and function of arteries, veins, and capillaries
Heart Chambers
- The four chambers of the heart are:
- Right atrium
- Left atrium
- Right ventricle
- Left ventricle
- Veins contain valves to prevent backflow due to low pressure
- Arteries lack valves because blood moves under high pressure
- Veins need help pushing blood against gravity (e.g., in the legs)
- The heart's pumping action keeps arterial blood flowing forward
Blood Vessel Characteristics
- Arteries transport blood from the heart to organs, have thick walls, are elastic, and have narrow lumens.
- Veins transport blood from organs to the heart, have thin walls, are less elastic, have large lumens, and contain valves.
- Capillaries carry blood to organs for gas exchange, have very thin walls, inelastic walls and very narrow lumens.
SCD
- People with sickle cell disease (SCD) have red blood cells that become hard and sticky, forming a C-shape instead of a disc shape
Tasks
- Find government or community programs in the UAE that promote heart health and fitness
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