Answer:
THC
Explanation: hope this helps .-.
A weight-to-height ratio. It's used as an indicator of obesity and underweight.
The axon takes impulses away from the cell body like arteries.
Answer:
Principles
Explanation:
"Specificity and progression" are two principles related to maintaining physical health. Therefore we can say that the word "principles" is the most suitable to replace the word "thing".
Also, "Specificity and progression" are neither exercises nor muscles. Nor are they acronyms, since an acronym is the word formed by joining letters or initial syllables of a group of words, pronounced as one word.
There are 4 chambers of the heart
