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human
[MCU] Are Captain America's bones unbreakable?

I understand the superhuman aspect, but a lot of what happens to him in the movies seems to indicate indestructible bones such as:

Winter Soldier: 

* Drops feet first directly into the ocean, from a height at which impacting the water would be the same as landing on concrete

* Falls on his shield escaping SHIELD HQ following the elevator fight

* Is beaten by a fellow super soldier with a metal arm (granted, this does land him in the hospital, but his face is intact)

Avengers/AoU:

* Handles Thor directly hitting his hammer with Mjolnir 

Civil War: 

* Falls from dangerous heights on 3 occasions (opening fight off the balcony, falling in the elevator shaft after Bucky's escape, and falling down the shaft of an old Soviet missile silo)

* Survives repeated punches from Iron Man, which we later see draw blood on Thanos

Infinity War:

* Comes off with hardly a scratch after Thanos sucker punches him in the face after Cap holds back the gauntlet

Endgame: 

* Again survives several direct punches from Thanos after having Avengers HQ dropped on him

* His left arm is only cut after Thanos breaks his previously thought to be indestructible shield

* Is punched directly in the chest by Thanos (an extremely pissed off Thanos at this point) while his back is on the ground. 

Keep in mind Thanos handled Hulk like a child, broke the Tesseract, and ripped the Mind Stone from Vision's vibranium infused body with just his fingers. I know that in Infinity War, after he gets the Soul Stone he's not exactly on the "warpath", but in Endgame, specifically, he is there to personally kill the Avengers. I find it hard to believe that Thanos "held back" his strength in Endgame, so does that mean Cap's body is strong enough to withstand physical blows from Thanos?
gpt
>so does that mean Cap's body is strong enough to withstand physical blows from Thanos?

Well, yeah. His body withstood physical blows from Thanos.

His insane durability and strength are self-evident -- what he doesn't have is strength feats that are *egregiously* strength feats the way Hulk bringing down a skyscraper is egregiously a strength feat. This makes it easier to overlook how insanely powerful he is.