As mentioned in the tutorial, a balanced diet is essential to a healthy organism. Deficiencies in particular elements can lead to a decline in health, and exhibit symptoms that are not desirable at all. The following information looks at some of these deficiencies and why they happen
Vitamin A is essential for night vision and improves effectiveness of the immune system. It can be found in many dairy products, and especially in carrots.
This vitamin is essential in the formation of red blood cells and lack of this may cause anaemia.
Scurvy is caused by a lack of vitamin C in the diet. Vitamin C is essential in the formation of red blood cells, antibodies and a healthy circulatory system. Symptoms of scurvy include bleeding gums and dizziness caused by the deficient blood supply.
Essential part of the diet required in the absorption of minerals in food, where a lack of vitamin D in the diet leads to a condition called rickets, where softening of the bones cause them to bend from the lack of calcium. Humans have the ability to synthesise vitamin D from sunlight
Important in preventing the oxidation of fatty acids in cells, and is commonly found in cereals and green vegetables
Vitamin K is important for the blood clotting process and can be synthesised in the human gut, and found in green vegetables.
To continue more about human development and functionality, click to go to the human biology tutorial.