The above-mentioned defense systems normally keep the lungs healthy.
He looks healthy.
They look healthy.
We must be healthy.
I was a healthy child.
My brother is healthy.
It’s not healthy for you.
He is as healthy as ever.
She looks nice and healthy.
His grandmother looks healthy.
It’s healthy to breathe deeply.
My grandfather is very healthy.
She gave birth to a healthy baby.
My uncle is not young, but healthy.
I’m not as healthy as I used to be.
He appears to be strong and healthy.
Though he is old, he is very healthy.
He is less healthy than he used to be.
To walk is a healthy form of exercise.
She gave birth to a fine healthy baby.
To keep early hours makes you healthy.
He is not so healthy as he used to be.
I am quite healthy and have had no cold.
She is quite pretty, but looks unhealthy.