An arch : is a two-dimensional curved beam construction for supporting loads between two points of support over an opening; traditional masonry arches were constructed from wedge-shaped stones locked together by loading from above.-Dictionary of Architecture and Building Construction (2008)

An arch : is a pure compression form. It can span a large area by resolving forces into compressive stresses and, in turn eliminating tensile stresses. This is sometimes referred to as arch action. As the forces in the arch are carried to the ground, the arch will push outward at the base, called thrust.-wikipedia

Lintel :a beam above a window or door opening.-Dictionary of Architecture and Building Construction (2008)

Lintel : is defined as a structural horizontal block that spans the space or opening between two vertical supports. In classical western construction methods, defining lintel by its Merriam-Webster definition, a lintel is a load-bearing member and is placed over an entrance way.-wikipedia

Anatomy of an arch :
A  keystone, key block
B  crown
C  rise, pitch
D  span
E  springing line
F  abutment, impost
G  springer, springing stone,skewback
H  intrados, soffit
K  voussoir
L   extrados
M  haunch

Elements of  the Arch

Types of arches - [true arches]

Constructing arches

Photo-gallery of some of the most famous arch constructions around the world:

Arch of Constantine, Rome

natural arch near Moab, Utah

Gateway Arch - 1965, St Louis, Missouri,USA

Lion Gate, Mycenae, c.1250 BC, Greece

References :
https://www.youtube.com/watch?v=UYtIFM1ek_M
https://www.youtube.com/watch?v=Q54kS0k-o5o
Dictionary of Architecture and Building Construction (2008)

https://en.wikipedia.org/wiki/Arch
Image refrences :
Dictionary of Architecture and Building Construction (2008)
-Google image search 


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Glass House by NAF Architect and Design

Physical transparency is an idea made simply possible by making large sheets of plate glass a prominent feature of the building, it is in essence a defining feature of modern architecture.

Transparency is a medium to open up closed spaces to Light and air. 

Transparency however as stated by an essay by Rowe and Slutzky is not only the visual transparency but also a includes spacial transparency.
"Transparency means a simultaneous perception of different spatial locations. Space not only recedes but fluctuates in a continuous activity" - an essay by Rowe & Slutzky.
This is depolyed by what they also called "phenomenal transparency", as indicating spatial depth through the layering of planes.

   ■ Means of promoting health.