I give you one example.

I need to keep fitness, or that time breathing exercise UB 4 block. That is where they stuck, or they have to find out MD 6+1. 

So I need to drink the osmosis water from Feel Rite, I personally getting this Big jar gallon jar, to the cart to push to this machine, to re-fill every time, and they have this sign outside showing you by the volume of the water unit. Its per unit money on the digit sign. That is one thing, in the real life.

Second time its that is the excretion, not secretion. Drinking and urination but you say pee, or poo. Its the elimination and your reproduction side of the period over this moon or tide. It just the words replacement, you understand clearly the excretion is in English means?

You have only three way

1) Urine

2) Sweat

3) Tear

That is the tear gland. Endocrine? One of those English words. You excrete out, but you have an internal medicine? On the functional endocrome to secret some of the internal anything....you saying the gland is functioning. 

The middle school textbook on biology I think. 

The skeleton protected 1) The external hitting  

And the muscle to keep 2) temperature maintain.

The compartment you cannot say the X-ray, but you almost just saying "filling the blank" where you organs are, but if you drawing the entire medical book, they or I will tell you, my hand sore on the system part. Just by imagining how tiring that is.

You can just make a brand new human body, if you just imagine of every single details really.