There is a mistake with this video at 1:43. It states "oxygen-starved blood returning from the circulatory system passes through the pulmonary veins and fill the left atrium". It should state "oxygen-rich blood returning from the pulmonary circulation via the pulmonary veins and fills the left atrium".
More schools need more teachers like you. One of the best biology teachers. Keep it up. I watch many of your videos for clarity and compare what I was taught to your lessons.
At 1:47 you say the blood returning from the lungs through the pulmonary veins into the Left atrium is oxygen starved when I think you meant to say oxygen rich.
Cardiac Cycle How does the heart function? Let us take a look. To begin with, all the four chambers of heart are in a relaxed state, 1.e., they are in joint diastole. As the tricuspid and bicuspid valves are open, blood from the pulmonary veins and vena cava flows into the left and the right ventricle through the left and right atria. The semilunar valves are closed at this stage. The SAN now generates an action potential which stimulates both the atria to undergo a simultaneous contraction-the atrial systole. This increases the flow of blood into the ventricles by about 30 per cent. The action potential is conducted to the ventricular side by the AVN and AV bundle from where the bundle of His transmits it through the entire ventricular musculature. This causes the ventricular muscles to contract. (ventricular systole), the atria undergoes relaxation (diastole), coinciding with the ventricular systole. Ventricular systole Increases the ventricular pressure causing the closure of tricuspid and bicuspid valves due to attempted backflow of blood into the atria. As the ventricular pressure Increases further, the semihinar valves guarding the pulmonary artery (right side) and the aorta (left sidel are forced open. the circulatory pathways. The ventricies now relax (ventricular diastole) and the ventricular pressure falls causing the closure of semilunar valves which prevents the backflow of blood into the ventricles. As the ventricular pressure declines further, the tricuspid and bicuspid valves are pushed open by the pressure in the atria exerted by the blood which was being emptied into them by the veins. The blood now once again moves freely to the ventricles. The ventricles and atria are now again in arelaxed (joint diastole) state, as earlier. Soon the SAN generates a new action potential and the events described above are repeated in that sequence and the process continues. This sequential event in the heart which is cyclically repeated is called the cardiac cycle and it consists of systole and diastole of both the atria and ventricles. As mentioned earlier, the heart beats 72 times per minute, Les that many cardiac cycles are performed per minute. From this it could be deduced that the duration of a cardiac cycle is 0.8 seconds During a cardiac cycle, each ventricle pumps out approximately 70 ml. of blood which is called the stroke volume. The stroke volume multiplied by the heart rate (no. of beats per min.) gives the cardiac output. Therefore, the cardiac output can be defined as the volume of blood pumped out by each ventricle per minute and averages 5000 ml.or 5 litres in a healthy individual The body has the ability to alter the stroke volume as well as the heart rate and thereby the cardiac output. For example, the cardiac output of an athlete will be much higher than that of an ordinary man. During each cardiac cycle two prominent sounds are produced which can be easily heard through a stethoscope. The first heart sound (lub) is associated with the closure of the tricuspid and bicuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves. These sounds are of clinical diagnostic significance.
thank god i found this channel! thankx alot .. seriously it just took few minutes to learn this otherwise i could have spent whole day learning from book
The blood entering the right atrium from the IVC and SVC are oxygen depleted while that entering from the pulmonary veins are oxygen-rich. Please correct the error. thank you
you did mention that diastole involves “oxygen-starved blood to fill the left atrium from the pulmonary arteries.” Should have said oxygen rich if I understand correctly… otherwise I am extremely confused.
did anyone else hear him say the oxygen starved blood from the circulatory system fills the LEFT atria? Left atria is filled from blood returning from the lungs- Is it not? 1:50 timestamp
@talha1775 Glad to hear that! 😄 The cardiac cycle refers to the sequence of events in a heartbeat, including the contraction (systole) and relaxation (diastole) phases. Blood flows through the heart as the chambers contract and relax, ensuring oxygen-rich blood circulates through the body. In 4 minutes, you’ve got the key points covered-efficient learning for the win! 👏💡
@ayandasandile-z9z "Oxygen-starved" and "deoxygenated" are related but not exactly the same. "Oxygen-starved" refers to a lack of sufficient oxygen, often in tissues or environments where oxygen levels are below what is necessary for normal function. "Deoxygenated" specifically refers to the state of blood or another substance that has already lost its oxygen content. So, while both terms involve a lack of oxygen, "oxygen-starved" emphasizes an ongoing deficiency, while "deoxygenated" refers to the absence of oxygen after it has been used or removed.
Fencing is an amazing fighting sport. Very intelligent, competetive, and safe at the same moment. There is one of the sports that you can train the longest (there are 80+ veterans tournaments). I strongly recommend. Especially if you love fighting sports but you are tired of being hit in the head😅
@wickedcabinboy In the cardiac cycle, the pronunciation of key terms is important for clarity: - **Diastole**: Pronounced as **"dye-AS-toh-lee"**. It refers to the phase when the heart muscle relaxes and the chambers fill with blood. - **Systole**: Pronounced as **"SIS-toh-lee"**. It denotes the phase when the heart muscle contracts and pumps blood out of the chambers. - **Sinoatrial Node**: Pronounced as **"SY-no-AY-tree-uhl node"**. It is the heart's natural pacemaker located in the right atrium that initiates the heartbeat. Ensuring correct pronunciation helps in understanding and communicating about the cardiac cycle effectively.
@@MedicalCentric - You're preaching to the choir. I spent 25 years as an ICU nurse in level 1 trauma centers. The majority of that time in a Pediatric ICU and as an ECMO specialist.
This 4 minute video explains it better than the 1 hour explanation by the lecture
That is very true
you're a visual learner
Frrrrr
Seriously!!!! 😂😂😂 It became so easy for me to learn... 😊
fr
There is a mistake with this video at 1:43. It states "oxygen-starved blood returning from the circulatory system passes through the pulmonary veins and fill the left atrium". It should state "oxygen-rich blood returning from the pulmonary circulation via the pulmonary veins and fills the left atrium".
Noticed this too! Thanks for confirming I'm not losing it lol
Thank you! I was thinking WAIT WHAT!?!
Yes i noticed too and after some research from google it should be oxygen rich blood
Also thought "hang on a sec...." :)
Thank you! I thought I was going crazy!! 😂😂😂😂
More schools need more teachers like you. One of the best biology teachers. Keep it up. I watch many of your videos for clarity and compare what I was taught to your lessons.
Happy to help
@@MedicalCentric it would help if you quality controlled your videos so they don't contain basic mistakes.
At 1:47 you say the blood returning from the lungs through the pulmonary veins into the Left atrium is oxygen starved when I think you meant to say oxygen rich.
u r right
Ty, i was so confused
I honestly thought this was just me. Thank god you mentioned this :)
I stopped the video and looked for a comment like yours ...
I was looking for this comment
Literally have my test in 30 minutes I was so confused 😭
This is the BEST video I've found on UA-cam!! THANK YOU!
Glad it was helpful!
This explains it so easily!!! All these other videos are like 20 mins long!! I was getting so confused! Thank you for this easy video!!
Glad it helped!
Thank you sir. It always helps me to understand the systole and diastole. Love from Bangladesh ❤️❤️❤️
THANK YOU FOR THIS VIDEO!! I’ve sat for hours through lecture and it only took your video to finally understand this concept.
Glad it helped!
So brief and concise
Just what I've always wanted
Thank you sirr
Cardiac Cycle
How does the heart function? Let us take a look. To begin with, all the four chambers of heart are in a relaxed state, 1.e., they are in joint diastole. As the tricuspid and bicuspid valves are open, blood from the pulmonary veins and vena cava flows into the left and the right ventricle through the left and right atria. The semilunar valves are closed at this stage. The SAN now generates an action potential which stimulates both the atria to undergo a simultaneous contraction-the atrial systole. This increases the flow of blood into the ventricles by about 30 per cent. The action potential is conducted to the ventricular side by the AVN and AV bundle from where the bundle of His transmits it through the entire ventricular musculature. This causes the ventricular muscles to contract. (ventricular systole), the atria undergoes relaxation (diastole), coinciding with the ventricular systole. Ventricular systole Increases the ventricular pressure causing the closure of tricuspid and
bicuspid valves due to attempted backflow of blood into the atria. As the ventricular pressure Increases further, the semihinar valves guarding the pulmonary artery (right side) and the aorta (left sidel are forced open. the circulatory pathways. The ventricies now relax (ventricular diastole) and the ventricular pressure falls causing the closure of semilunar valves which prevents the backflow of blood into the ventricles. As the ventricular pressure declines further, the tricuspid and bicuspid valves are pushed open by the pressure in the atria exerted by the blood which was being emptied into them by the veins. The blood now once again moves freely to the ventricles. The ventricles and atria are now again in arelaxed (joint diastole) state, as earlier. Soon the SAN generates a new action potential and the events described above are repeated in that sequence and the process continues.
This sequential event in the heart which is cyclically repeated is called the cardiac cycle and it consists of systole and diastole of both the atria and ventricles. As mentioned earlier, the heart beats 72 times per minute, Les that many cardiac cycles are performed per minute. From this it could be deduced that the duration of a cardiac cycle is 0.8 seconds During a cardiac cycle, each ventricle pumps out approximately 70 ml. of blood which is called the stroke volume. The stroke volume multiplied by the heart rate (no. of beats per min.) gives the cardiac output. Therefore, the cardiac output can be defined as the volume of blood pumped out by each ventricle per minute and averages 5000 ml.or 5 litres in a healthy individual The body has the ability to alter the stroke volume as well as the heart rate and thereby the cardiac output. For example, the cardiac output of an athlete will be much higher than that of an ordinary man.
During each cardiac cycle two prominent sounds are produced which can be easily heard through a stethoscope. The first heart sound (lub) is associated with the closure of the tricuspid and bicuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves. These sounds are of clinical diagnostic significance.
Thank you for this! I had a confusion about atrial kick but now it make some sense.
These are NCERT lines isn't it?
You explained the best and I needed this lecture for Indian cbse board class 11 th cardiac cycle ❤
Love the animation, makes it sooo much easier to conceptualise and grasp. Thank you!
Glad it was helpful!
thank god i found this channel! thankx alot .. seriously it just took few minutes to learn this otherwise i could have spent whole day learning from book
glad it was helpful ! and keep supporting
@@MedicalCentric Sure☺️
3D animation is a reason for that online is much better than offline coching centres...
Explained better in short duration 🤗🤗
isn't it meant to be oxygen rich blood from pulmonary circulation into the left atrium?
Yes, it is a major mess up on their part
@@T2star worried that some people may have got a question wrong because of it lol
This is a very good video
Thanks so much
You are welcome.
Love from India Your explanation was superb.🔥🔥🔥
Glad it was helpful
This was one of the best video i came through Thankyou so much♥️
Great video
Thanks for your lesson I have well understood
You are welcome!
Such easy concept but no book explains it easily
The blood entering the right atrium from the IVC and SVC are oxygen depleted while that entering from the pulmonary veins are oxygen-rich. Please correct the error. thank you
you did mention that diastole involves “oxygen-starved blood to fill the left atrium from the pulmonary arteries.” Should have said oxygen rich if I understand correctly… otherwise I am extremely confused.
It's not the only mistake
Thank u. I didn’t know both atria filled at the same time.
Glad it was helpful.
thank you thank you thank you !!!! so helpful!!!
Glad it helped!
Thank you so much
Thank you
Great video, thank you for sharing!
You are welcome
That was incredible!
I'm a student. Thank you for your video which is very useful for understanding ☺️
Beautifully Explained!
Thanks So Much! 💐👌👌👌
Most welcome 😊
I'm amazed that we humans work. :)
Thank you 🙏 ❤
God bless you bro, our lecturer even uses your video to explain this to us.
Nice explanation
just 2 words. thank you
You are welcome.
thank you for the wonderful explanation sir!!
Good video
Thanks for the visit
Explains it just like the mometrix book the ATI Teas one. For any students studying for teas exam!!!
at 3:01 are the fiber branches the purjinkie fibers??
Could you please give cardiac cycle in written and summary of it
did anyone else hear him say the oxygen starved blood from the circulatory system fills the LEFT atria? Left atria is filled from blood returning from the lungs- Is it not? 1:50 timestamp
top video knackers
Soo easy...thank you uuu😊
Supreb explanation ❤️
Thank uu ❤️❤️
1:43 you mean the oxygen rich blood coming from the lungs passes through the pulmonary veins and fills the left atrium.
Good job 👏🏿
4 min is better than whole class lecture 😅
@talha1775 Glad to hear that! 😄 The cardiac cycle refers to the sequence of events in a heartbeat, including the contraction (systole) and relaxation (diastole) phases. Blood flows through the heart as the chambers contract and relax, ensuring oxygen-rich blood circulates through the body. In 4 minutes, you’ve got the key points covered-efficient learning for the win! 👏💡
Good
thank u sir
Welcome
1 What is longest phase of cardiac cycle?
2. What's shortest phase of cardiac cycle?
Does oxygen starved and deoxygenated have the same meaning
@ayandasandile-z9z "Oxygen-starved" and "deoxygenated" are related but not exactly the same. "Oxygen-starved" refers to a lack of sufficient oxygen, often in tissues or environments where oxygen levels are below what is necessary for normal function. "Deoxygenated" specifically refers to the state of blood or another substance that has already lost its oxygen content. So, while both terms involve a lack of oxygen, "oxygen-starved" emphasizes an ongoing deficiency, while "deoxygenated" refers to the absence of oxygen after it has been used or removed.
Blood pump out of the heart is the systole
As the heart relaxes, blood enters the heart. This is the diastole
doesn't the left atrium receive oxygenated blood or am i trippin?
U r right bro
Simplest explanation I can found. Why can't my book simplify like this? 😂😂
Glad this was helpful
👍👍👍👍
Fencing is an amazing fighting sport. Very intelligent, competetive, and safe at the same moment. There is one of the sports that you can train the longest (there are 80+ veterans tournaments). I strongly recommend. Especially if you love fighting sports but you are tired of being hit in the head😅
Ich bin so verzweifelt, dass ich mir jetzt ein englisches Video zu dem Thema angucke… Ich hab 5 Punkte in englisch
I love the easter egg mistake...makes you want to make sure what your talking about haha.
Check the pronunciation of diastole and systole and other terms (sinoatrial node). They are mispronounced in this video.
@wickedcabinboy In the cardiac cycle, the pronunciation of key terms is important for clarity:
- **Diastole**: Pronounced as **"dye-AS-toh-lee"**. It refers to the phase when the heart muscle relaxes and the chambers fill with blood.
- **Systole**: Pronounced as **"SIS-toh-lee"**. It denotes the phase when the heart muscle contracts and pumps blood out of the chambers.
- **Sinoatrial Node**: Pronounced as **"SY-no-AY-tree-uhl node"**. It is the heart's natural pacemaker located in the right atrium that initiates the heartbeat.
Ensuring correct pronunciation helps in understanding and communicating about the cardiac cycle effectively.
@@MedicalCentric - You're preaching to the choir. I spent 25 years as an ICU nurse in level 1 trauma centers. The majority of that time in a Pediatric ICU and as an ECMO specialist.