Question

which is not a part of respiration respiratory system nose, oesophagus,diaphragm or
lungs

Answer 1

The oesophagus is not a part of the respiratory system.

The oesophagus is associated with the digestive system, and is also referred to as the gullet or food pipe. It is located on the upper part of the digestive system. The maximum length of the oesophagus in a human being is 25 cm (10 inches) long.

Answer 2

Metalloids:

Metalloids can be defined as the elements show intermediate properties of metal and non-metals. All known elements can be classified as metals, non-metals and metalloids. Here, metals are shiny hard conducting elements whereas non-metals are mainly found in liquid or gaseous state. They are insulators of heat and electricity.  

Two examples of metalloids:

1. Silicon (Si)
2. Arsenic (As)

So, these elements exhibit intermediate properties of both types of elements.