This is a view from the interior of the 2nd floor, we can see the detail of the the floor trusses. The main trusses are running horizontally and the bridging trusses connecting the main trusses are running from front to back -they help spread the load of the structure. Above the trusses is the decking which runs continuously across the floor.
This is the interior of a stairwell, we can see the framing of the walls -the rim joist of the 2nd floor and the steel studs of both the 1st and 2nd floors. The man that is walking is steping onto the landing between the 1st and 2nd floors.
Between the steel studs there is wood blocking for the handrail. The handrail on the left has more elements, the balusters are the vertical members, and each articulated member is a post(it isnt butted up against a wall, but an empty cavity -unsafe, needs the balusters and posts)
From this angle we can also see a stringer of stairs leading up to the 2nd floor, the treads are the horizontals and the risers are the verticals.

This is the view of a window from the interior, the weather proofing that is nailed to the exterior is pulled through the rough opening before the prefabricated window is installed. The main frame is made up of the head, the side jambs and the sill. The sash is the window frame that holds the panes of glass, it is made up of the horizontal members -rails, and vertical members -stiles. Connecting the panes of glass are the muntins. This is an awning window and its operator is on the bottom, resting on the sill.

We can also see the interior framing of the wall and the window. The wall studs are running vertically, butted against the window are the jack studs and next in line are the kingstuds. Under the window are the cripple studs, all the studs are sitting atop the bottom plate.