Biology - How the Kidneys Work - (Kidneys Part 1/3) #27

This video covers:
- The 3 main functions of the kidneys:
1) removing waste,
2) regulating levels of ions, and
3) regulating levels of water
- How the kidneys can achieve all of this using filtration and selective reabsorption
- How anti-diuretic hormone (ADH) is used to control water levels

Exam board specific info:
AQA - Separate science only. The ADH part is higher tier only.
IGCSE - Separate science only
Edexcel - Separate science only. The ADH part is higher tier only.
OCR 21st Century - Separate science only. The ADH part is higher tier only.
OCR Gateway - Separate science only. The ADH part is higher tier only.

Maths Playlist:

GCSE Chemistry playlist:

GCSE Biology Playlist:

GCSE Physics Playlist:

[atx]

Bro, I can't thank u enough for all of these free lessons I love your video’s and they literally got me an A in chemistry even tho I know you don't make any profit from this. God bless you man your an amazing person and very kind and thank you again

[chimpu-lsfg]

cognito - i just had my mocks and I got an average of 90% on all my sciences solely due to your channel. I really appreciate your help!

[Matt-xhwq]

Post-Video quiz:
1. What 3 things do the kidneys regulate? (0:05)
2. What are the 3 main jobs of the kidneys (0:24), (0:50)
3. What is deamination? (0:38)
4. Why is water regulation important? (1:57)
5. What are nephrons? (2:50)
6. What are tubules? (3:00)
7. How are water levels regulated in the body? (4:29)
8. What is ADH and what does it stand for? (4:56)

[foteinikalamatianou]

You guys are genuinely awesome! It took me hours to understand this for my unit tests throughout the year and now all I had to do for my mocks was watch your videos once or twice. Thank you so much! <3

[Puffin]

i don't know how to thank you for these great lessons... these lessons made me love biology and i scored 86 in my bio exam... keep up this great stuff 🙂

[Cognitoedu]

- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
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Amadeus & Tom

[abdullahnisar]

Definitely the best teacher on YouTube I have ever seen. Thanks for these videos.

[solar]

Thank you so much for this incredibly well-explained educational video! Your clear and concise delivery made it easy for me to grasp the concepts. I appreciate the effort you put into creating valuable content. Keep up the great work! 👍

[siyasingh]

I love how you keep your car in your house...anyways, COGNITO YOU DA BEST!!! People like you are the true heroes of our civilisation.

[DeyshaanGTR]

Let’s goo we all have our paper 1 tomorrow Tysm and good luck inshallah we do well ❤️

[ifesjournal]

you guys need to make textbooks, your drawings are amazing

[Anne-yfny]

2:40 Never in my life, thought I would go like 'Aw these kidneys are soOo cUte!'

[danielgeorge]

Thanks I have external exam coming up really soon this has helped me thanks

[kgalalelokeafetole]

I appreciate ur work it helped me a lot and I passed my mock exams and I finally got a phone so once again thank you 🙏🏽 😊☺️

[jessie]

my biology gcse is in two days, and i've missed a few important lessons but thanks to your videos, they are really good at making me understand! i don't have high hopes for an a or a*, but i'm hoping for a b!!

[astrolance]

that house cleaning analogy made me understood EVERYTHING. i was so confused why dont the kidneys selectively absorb everything in one go at the renal tubule but the house analogy made everything clear

[avg]

An amazing, compact and thorough explanation, thank you so much!

[soohyun]

These videos really help me understand the topics covered. Thank you.

[pyxisnub]

thank god there is this video i accidently left my papers at school and there's going to be a pop quiz tomorrow im so glad this video exist tho some infomation i havent learnt yet its still good to learn it in case

[yeetbys]

Cognito Thank you so much for your videos that you post. When we were learning about the kidney my teacher warned us that it would be the hardest unit ever. At first I believed her but after seeing your amazing videos you made it seem so easy❤❤❤