סרטונים מובילים
Team 15 F2013 Foundations of Biology
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Lyrics:
Thinking about cells
They can reproduce and divide all by themselves
One of two division forms known as mitosis
A mother cell divides into two identical daughters, perfect copy
Remember this, two identical copies, K?
Two sets of chromosomes, nucleus DNA
Most cell divisions in your body’s system used for your development
And old cells that get worn out, mitosis makes perfect copies, ah
Let’s start with the interphase
Right before mitosis takes place
The DNA within the cell is copied
And centrosomes copied, the role this will play is a key
And now we move to the prophase
where chromosomes condense into x-shapes
mitotic spindle grows, extends to opposite poles
And hey, dissolve the nuclear membrane
Metaphase is the next one
Chromosomes spindle into the middle and then they’re all lined up
Every chromosome has two kinetochores
With microtubules secured to opposite spindle poles
Hey, and how we on to the Anaphase
When sister chromatids separate
Thanks to the motor proteins
Moving along microtubules as molecular machines
Oh hello, Mr. Telo (phase!)
Almost done dividing into two, then onto cell growth
That mitotic spindle disappear
And new nuclei start to form here and here
And when the cytoplasm splits
Concurrent with telophase, it’s called cytokinesis
It’s different whether your cell is in plants or animals
Just remember after this, you have two identical cells
Inter, Pro, Meta
Ana, Telophase
Inter, Pro, Meta
Ana, Telophase
- - - - -
Lyrics and performance by Jam Campus
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#Pulleys #CompoundPulleys #TypesOfCompoundPulleys
This video is part of a playlist having the following videos. Watch all of them in sequence for a better learning experience.
Enjoy learning :)
Video No.1: Simple Machines(Part-1)
https://youtu.be/JlA6T_64o0c?l....ist=PLoPH9JUqy7EQITA
Video No.2: Simple machines (Part-2)
https://youtu.be/NcmRJspWyNo?l....ist=PLoPH9JUqy7EQITA
Video No.3: Simple Machine – Lever and its types
https://youtu.be/5HTaJ2mCGTw?l....ist=PLoPH9JUqy7EQITA
Video No.4: Lever | Effort arm and load arm of a Lever
https://youtu.be/HAhf311RZkY?l....ist=PLoPH9JUqy7EQITA
Video No.5: Calculating Mechanical Advantage of Lever
https://youtu.be/wIaHQsxGj78?l....ist=PLoPH9JUqy7EQITA
Video No.6: Gears(Part-1) | Characteristics | Gearing Up | Gearing Down
https://youtu.be/0RGzUQ6LJnw?l....ist=PLoPH9JUqy7EQITA
Video No.7: Gears(Part-2)Types and Functions
https://youtu.be/f8lqpMLZlBc?l....ist=PLoPH9JUqy7EQITA
Video No.8: Simple Machines–Compound Pulleys and its Types
https://youtu.be/NOeRoLgvYZM?l....ist=PLoPH9JUqy7EQITA
Video No.9: Simple Machines–Pulley and its types
https://youtu.be/EhI-mmQMVkU?l....ist=PLoPH9JUqy7EQITA
Our young ones can learn about the following topics by watching this short educative video:
Topics Covered:
• Compound pulleys
• Block and tackle
• Types of compound pulleys
• The mechanical advantage of compound pulleys
• Uses of pulleys in our daily life
I hope you liked our video.
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Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes (the sex cells, or egg and sperm). In humans, body (or somatic) cells are diploid, containing two sets of chromosomes (one from each parent).
Grade 8 Mathematics
Plant cells have a cell wall in addition to a cell membrane, whereas animal cells have only a cell membrane. Plants use cell walls to provide structure to the plant. Plant cells contain organelles called chloroplasts, while animal cells do not.
Grade 8 Mathematics
Excretory system
The excretory system removes waste and toxins from the human body.
Your skin eliminates waste by sweating.
Your lungs eliminate carbon dioxide.
Your kidneys filter over 180 liters of blood in order to produce urine.
The kidneys filter waste like urea. This liquid that is collected is called urine.
Your kidneys are made up of millions of filtering units called nephrons.
Grade 8 Mathematics
What is Homeostasis? | Physiology | Biology | FuseSchool
Homeostasis is a term first defined by Claude Bernard in 1865. It means maintaining a constant internal environment.
Senses all around the body are measuring various things and sending the information back to the brain. The brain then does its best to keep all these things stable and constant to keep the body working properly. Homeostasis is maintaining a constant internal environment.
What kind of things need to be kept constant in the body? It's very important to keep our temperature the same, at around thirty seven degrees Celsius. You can find out more about this in the video on temperature regulation. You also need to keep the levels of sugar in the blood constant along with levels of ions and water. Your blood pressure needs to be carefully monitored along with the amount of waste in the blood such as carbon dioxide and urea.
Let's say one of these factors goes too high or low, what is the brain going to do to get it back to normal levels? The answer to that is negative feedback. Negative feedback is the process whether the brain uses either a hormone or the nervous system to send a signal to the part of the body that can rectify the problem. For example, after you eat a meal with your blood sugar level increases. This is detected, and the pancreas will release a hormone called insulin that causes the sugar to be stored in the liver. The blood sugar level will then return to normal.
Negative feedback is the leap from which the body takes a stimulus, reacts by responding accordingly and brings the body back to the normal levels.
So why is homeostasis so important? Our metabolism, which is all the chemical reactions in our bodies that keep us alive, is controlled by enzymes. These enzymes only work in very specific conditions. If these conditions change, they could stop working and we could die.
Luckily, all of this happens without you having to think about it. If you had to do it yourself, you would have to spend all day and night just trying to keep all these things constant and we'd have no time to doing fun like watch videos of cats on the Internet.
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grade 8 art
A point is a location in space. It has neither shape nor size. A line is a connected set of points that extends infinitely in two directions. A plane can be defined by three noncollinear points, two parallel lines, or two intersecting lines.
Mr. Andersen describes the major groups on the periodic table.
Intro Music Atribution
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#kindergarten #grade1 #math #even #odd
This video teaches children about even and odd numbers!
0:08 Question 1
0:33 Question 2
0:58 Question 3
1:23 Question 4
1:49 Question 5
2:14 Question 6
2:39 Question 7
3:08 Question 8
3:34 Question 9
3:59 Question 10
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Higher Physics - equations of motion. I derive all 4 equations of motion then go over some important points to remember when using them. Look out for the video of examples as well!
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Chapters...
0:00 Introduction
0:25 The letters in the equations - suvat
0:57 Derivation of v=u+at
1:42 Derivation of s=ut+½at²
2:50 Derivation of v²=u²+2as
3:57 Derivation of s=½(u+v)t
4:38 Example question
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Grade 10 English
The purpose of this lesson is to introduce the unit and allow students to demonstrate their current understanding of weather. (Seattle)
In this basic accounting lesson, we explain what the General ledger (T accounts) is, why we record transactions in the General ledger (T accounts), and how to record the transactions. We go through various examples where we post to the general ledger (t accounts). We also show how to post to the general ledger from journals as well as how to close off/balance off the t accounts (general ledger).
Check out other straightforward examples on our channel.
Posting from Journals to Ledgers | with Examples: https://youtu.be/MuHEONNRabg
How to easily Remember DEBITS and CREDITS | Simple Tip: https://youtu.be/_AKoCgOlTcw
Debit and Credit Explained | Accounting Basics: https://youtu.be/qBTpJSiAJBw
Accounting Equation Explained | Accounting For Beginners: https://youtu.be/0H506eq8DZQ
Bank Reconciliation Statement Explained | FULL EXAMPLE: https://youtu.be/GjjvV1dUKrw
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Arms: Stand up straight with one arm relaxed, and find the midpoint between the shoulder bone and the elbow of that arm. Calves: Measure halfway between the knee and the ankle. Chest: Stand with your feet together and torso straight, and find the widest part around your bust.