In the human heart diagram, there are four chambers in this tireless pumping organ. All the chambers work in coordination pump blood round the body.The left chambers contain the oxygenated blood from the lungs.
This blood is pumped out of the heart via the arteries which transport the this oxygenated blood round the body to the muscles and vital organs.
The blood returns to the heart via veins. The veins return to the right side of the heart carrying carbon dioxide. The heart pumps this returning blood to the lungs.
In the lungs the carbon dioxide is removed from the blood and breathed out. The carbon dioxide is replaced with oxygen and returned to the left side of the heart to be pumped around the body again.
Your tongue is a mass of muscles. The specific arrangement of muscle fibres allows it to move freely in any direction inside the mouth to performs several different tasks, including eating, swallowing, speaking, licking, sucking, and helping to pronounce words when we speak.
Your tongue contains thousands of taste buds. Taste buds are small organs, embedded in the tongue that enable us to experience taste.
The tip or apex of the tongue accounts for the front one-third of the tongue. It is very mobile and rests against the incisor teeth in the mouth. The taste buds for “sweet” are on this part of the tongue.
The back two-thirds of the tongue form its body. The surface is slightly rough. This is this part of the tongue where the tongue tastes salty, bitter and sour flavours.
The function of nose in respiratory system is very important. It is responsible for filtering and inhaling air containing vital oxygen .
The septum divides the nasal cavity to create two equal sized nostrils. The fine hair or cilia in the nose behave like a mechanical filter removing particles from the air we breathe in.
The nose also pre-warms the air we breathe during inhalation to match body’s temperature .
Of course, the nose is also the organ responsible for our sense of smell. The nostrils contain six million cells that are sensitive enough to detect a huge number of different smells. Humans have the ability to detect as many as over one trillion distinct scents.
The Human Body: Teeth and Eating by Manchester University
All you need to know about teeth.
With an introduction by Professor Liz Kay of Manchester University this is a comprehensive suite of resources containing both information and interactive activities all about teeth.
From the structure and types of teeth, through how they develop and fit in the mouth to interactive games around the theme of teeth, there is plenty for pupils to go at.
The information sections end in a quiz and pupils can pick up a code for correctly answering the quiz and enter these in the final claim Your Stamp screen to receive an award from the University by email.
This works on desktop computers and likely some tablets but as in requires Adobe Flash plugin it will not work on iPads.