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In this lesson, you can learn what you can do to help create a sustainable environment.
With the help of this lesson, you can understand why it is important to make decisions that protect the future.
This lesson helps you understand how waste affects the environment and your everyday life.
The effects of excessive phone use on our posture
In this lesson, you can read about how addiction develops and the warning signs that may indicate it.
The functioning of the human body and a car is similar: both use an external energy source whose energy is transformed by internal processes into the energy required for operation.
Egy fa árnyékolással és párologtatással csökkenti a környezet hőmérsékletét, így természetes, energiatakarékos módon akár több klímaberendezés hűtőhatásával is felérhet.
Humans have 4 types of teeth: incisors, canines, premolars and molars.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
The ribs, the sternum and the spinal column form the skeleton of the chest.
Eukaryotic cells contain a number of organelles.
Lymph vessels carry lymph to the blood vessels, while lymph nodes are integral parts of the immune system.
The pancreas and the liver empty digestive juices into the duodenum.
The eye is one of our most important sense organs. When stimulated by light, electric impulses are produced by its receptors.
This animation demonstrates the parts of the head, the trunk and the limbs.
The respiratory system is responsible for the intake of oxygen and the release of carbon dioxide.
Our body's internal support structure to which skeletal muscles are attached.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.
The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.
The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.
During voice production, the vocal cords are vibrated by the air flowing out of the lungs.
The longest part of the digestive system, where most of the digestion and absorption takes place.