The ”Seed Coat” or the outermost layer of the seed. On the outer coat you can find the Hilum and Micropyle.
The next layer is the ”Cotyledon” which makes up most the inner area of the seed and acts as a sort of natural sponge, holding moisture for the HPA and plumule..
The basis of your root comes form the ”Hypocotyl-radicle axis” or ”HPA” as i called it earlier, but honestly, lets just call it a root.
Lastly, the area we all like to see, the the ”Plumule” aka, those little baby green shoots.