Curated Video
La membrana celular
Viaje al interior de la célula para observar la actuación de la membrana celular como barrera y zona de entrada. ¿De qué modo capta los nutrientes al tiempo que excluye las moléculas que puedan ser dañinas?
Twig - Biología - Las...
Curated Video
El transporte en las plantas
¿Cómo consigue un árbol alto llevar el agua de las raíces a las hojas? ¿Cómo llega el alimento que se fabrica en las hojas al resto de la planta? Descubre cómo transportan las plantas los materiales a través del xilema y del floema.
...
Science ABC
Do Fish Get Thirsty and Do They Need to Drink Water?
Whether fish get thirsty depends on the fish you look at. Fish that live in freshwater have different physiology to deal with their environment than fish in salty seawater. These physiological differences dictate whether fish need to...
Curated Video
Salt: Food Preservative
Salt was discovered thousands of years ago as a way of preserving food. How does it do this? And what else does salt preserve? Chemistry - Chemical Industries - Learning Points. Food rots because of bacteria and fungi. Salt is an...
Curated Video
Plant Transport
How does a tall tree draw water from its roots to its leaves? And how does food made in leaves reach the rest of a plant? Discover how plants transport resources via the xylem and phloem. Biology - Plants - Learning Points. Transpiration...
Curated Video
Root Hairs
Find out how remarkable adaptations allow the spinifex plant to thrive in the desert. Biology - Plants - Learning Points. Root hairs are specially adapted to suit their role. Root hairs increase the surface area of the roots for...
Curated Video
Osmosis and Volume
We look at the effects of osmosis on the volume of potato and the appearance of red onion cells. Two cylinders of potato are measured and weighed before one is placed in salt water and the other in fresh water. We can see how osmosis...
Curated Video
Bouncing Eggs
We use vinegar to remove the shells from eggs without breaking them. Two eggs are placed in a beaker of vinegar, but one is half coated with clear nail polish. The exposed shells dissolve over time and the eggs swell as more water moves...
Curated Video
The Cell Membrane
Journey inside the cell to see how the cell membrane acts as both a barrier and an entrance. How does it take in nutrients while keeping out potentially damaging molecules? Biology - Cells And DNA - Learning Points. The cell membrane...
Curated Video
Osmosis
The movement of water from a less concentrated solution to a more concentrated one, through a partially permeable membrane. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Curated Video
Xilema y Floema - Transporte en Plantas
Las plantas tienen un sistema de transporte para mover sustancias. El xilema transporta agua y solutos desde las raíces hasta las hojas mediante la transpiración, mientras que el floema lleva glucosa y aminoácidos desde las hojas a toda...
Curated Video
Transporte en las Células: Difusión y Ósmosis
Este video explica cómo las células absorben sustancias útiles y eliminan desechos mediante difusión, ósmosis y transporte activo. Estos procesos ocurren a través de la membrana celular y permiten el intercambio de materiales entre las...
Institute of Human Anatomy
Why Drinking Water Is So Important
In this video, Justin from the Institute of Human Anatomy discusses how the body regulates hydration levels, as well as what happens when the body becomes dehydrated.
Curated Video
What is Diffusion? How Does it Work? What Factors Affect it? #7
This video covers - What diffusion is - How it works - How it applies to cell membranes - The 3 factors that affect the rate of diffusion (concentration gradient, temperature, surface area) Exam board specific info: KS3 All relevant to...
Curated Video
GCSE Biology - Osmosis #8
In this video, we cover: - What osmosis is - How osmosis works - How to understand water concentration Exam board specific info: AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st...
Curated Video
Why turkey is hard to cook
Here's why cooking a turkey is so hard - and how brining can help.
The Noted Anatomist
Osmosis
This brief video tutorial briefly discusses osmosis, osmotic pressure, oncotic pressure and tonicity: 0:00. Introduction 0:13. Osmosis 1:31. Osmotic pressure 2:03. Oncotic pressure 3:34. Tonicity - 3:47. Isotonic solution - 4:15....
Curated Video
The Consequences of Osmosis
The video is a lecture presentation discussing the consequences of osmosis. The presenter explains what osmosis is and how it works, with a focus on the movement of water molecules through partially permeable membranes. They also explain...
Visual Learning Systems
Understanding Osmosis
In this video, we learn about osmosis, which is the process by which cells gain water by allowing it to flow from an area of higher concentration outside the cell to an area of lower concentration inside the cell. Through a simple...
Curated Video
Osmoregulation: Maintaining the Balance of Water and Mineral Ions in the Body
This video explains the concept of osmoregulation, which refers to the control of the balance of water and mineral ions in the body. The video explains the importance of maintaining a constant internal environment for efficient cell...
TMW Media
Properties Of Water: How water sustains living things
How do plants use water to live and grow? How does water help the human body? What food contains the highest amount of water? Properties Of Water, Part 3
Curated Video
The Osmosis Experiment: Theory, Procedure, and Results
The video is a lecture presentation on the topic of osmosis experiment. The presenter defines osmosis as the diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane. The...
Curated Video
Analyzing Osmosis Experiment Results and Estimating Sugar Concentration in a Potato Cell
This video is the second of two lectures on osmosis experiments. The presenter discusses how to process and analyze the results obtained in the first presentation and estimate the sugar concentration in a potato cell. The presenter...