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We start out with over 300 bones, but as we grow up some fuse together and we end up with 206.
Haemoglobin and oxygen bind temporarily to form oxyhaemoglobin.Haemoglobin and oxygen fuse together, and the haemoglobin later dissolves.
And it's happening in your blood RIGHT NOW.
Medulla oblongataSuprachiasmatic nucleus
Here's a handy song that will help you remember what it does.
Bodily fluids contain water because it's an ideal transport medium.
Globulins are proteins in the blood.
The endothelium is a thin layer of cells on the inside of veins and arteries.
Allow blood to flow only one way.Support the walls of the vein.
It's a valve.
There are elastic fibres in a vein, but they're the layer above the endothelium.
Adenine and GuanineAdenine and Thymine
Adenine pairs with thymine, and cytosine pairs with guanine.
It's lumen. The serosa is a fluid-secreting membrane that covers some of your organs.
The bronchioles are constricted and mucus is produced.The muscles in the bronchioles relax.
The muscles in the bronchioles actually contract, restricting the amount of air that can pass through bronchioles in the lungs.
Diploid cells have the full number of chromosomes. Gametes are haploid cells, and they have half the number of chromosomes as usual.
FAD (flavin adenine dinucleotide) molecules live in mitochondria, but they're in the matrix.
Sodium and potassium ionsCalcium and zinc ions
Packages proteinsStores ATP
It's the largest organelle and was one of the first to be discovered. It's present in eucaryotic cells.
It's a carbohydrate.It's insoluble in water.It's a hexose sugar.
Glycogen is a polysaccaride of glucose. It provides long-term energy storage and is stored mostly in your liver and muscles. A hexose sugar is a monosaccharide with just six carbon atoms.
86 billion86 million
It's 86 billion. So many.
The Hardest Quiz About Your Body You Will Ever Take
Not great! You could do with brushing up a bit.
Pretty good! You've obviously been revising.
Amazing! You know your insides inside-out. Congratulations.