The sound of a heart beat is usually described as a thump.
Pulses
Weak describes the Articles of Confederation.
"Environmentally" can be an adverb; that which describes, modifies or enlarges upon a verb (action word), or an adjective (that which modifies or describes a noun).Thus, in the sentence "Stan is very environmentally conscious.", "environmentally" is an adverb modifying the verb "is conscious".In the sentence "Stan has given you some very environmentally sound advice.", "environmentally" is an adjective modifying the adjective "sound".
Carcinogenic
Small best describes a worm hole.
the cardiovascular system working is simply called circulation.
Beating.
Pulses
In "Shugo Chara!", DOKI is the feeling of one's heart beating faster or feeling excited. It represents the emotional connection between characters and their guardian characters.
Vibrations
sound
rataplan
It is an onomatopoeia, or a sound word, which describes the sound a ping against a metal object might sound like.
Jangling.
The word "volume" represents the relative "loudness" of a sound. The word "decibel" is a unit of measurement for sound.
Its a simile because it has the word like in it :]
instrument