How do you descrive the tympanic membrane?

Tym-panic membrane, also known as eardrum, is a thin layer of tissue in the human ear that absorbs sound waves from the external environment and transfer them to the small bones in the cavity of the tym-panic (middle-brain)  called auditory ossicles.

The membrane located over the outer canal end .The edges are fixed into a bone ring.

The drum membrane made up of three layers including outer layer,inner layer and a layer of radial and circular fibres between the outer and inner membrane.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

answer; ///(b) it is composed of four protein chains and four heme groups;