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The axolotl, also known as Mexican salamander, is an amphibian species that keeps its gills even in adulthood.
Lemurs only live on the island of Madagascar. Here are a number of fascinating facts about them.
Organs that detect signals of the environment or of the body and transmit them to the brain as nerve impulses.
This animation helps you learn the basics of healthy eating.
The American bison is the largest land animal in North America.
There are two basic cell types: prokaryotic and eukaryotic cells.
The adrenal glands are responsible for maintaining homeostasis and producing a rapid response in stressful situations.
Noise surrounds us everywhere, but it can be harmful. Let's see how.
Quetzalcoatlus was one of the largest known flying animals of all time.
Learn more about the early stages of human development with this lesson.
The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.
The plumage and streamlined bodies of birds play a key role in flying.
Let's examine the anatomy of birds and their vital processes from the point of view of flying.
In this lesson you will familiarise yourselves with special organisms, that is lichens.
This lesson presents which animals developed feathers during the course of evolution.
This lesson presents the different types of forests and their layers.
The lesson introduces you to our innate and learnt reflexes.
This lesson presents the anatomy of the eye, the mechanism of vision, and common vision problems.
This lesson presents the structure and functioning of the human urinary system.
This lesson presents the vision and the evolution of eyes of animals.