Plainly
look up a word, understand it — no rabbit hole
scalp
nounSKALP
meaning in plain English
The skin and hair on the very top of your head.
Imagine a barber pulling a hat off a client; he sees the scalp, the skin and hair right on top of the head.
for example
After the game, the player scratched his itchy scalp under his hat.
Imagine running your fingers through someone’s hair and feeling the hard bone underneath. That’s their scalp—the thin layer of skin and hair covering it.