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Blood consists of 4 different elements: 

1. 55% is PLASMA 
   
2. other 45% are 3 different components: 
   

• red blood cells
  
• w...

So before we understand this we need to quickly explain homeostasis. This is essentially the process by which the body maintains a constant internal environment. Our external environment changes all the t...

In arteries, the main structural difference is the thickness of the arterial wall, due to an increased amount of smooth muscle, arteries have much thicker walls than both veins and capillaries to ensure t...

Transcription - occurs in the nucleus. 

to prevent damage to the DNA, when a protein is required to be synthesised, a copy of that particular gene is encoded onto an mRNA (messenger RNA) molecule.T...

Glycogen is a polysaccharide composed of alpha glucose monomers which are a respiritory substrate involved in the production of energy (ATP). 1-6 glycosidic bonds between glucose allow glycogen to be bran...