the cat was breathing rapidly for the dog had scared it.
8-10 sentences
you are going to need six or eight sentences for you application
they need to be balanced
For relaxed breathing, called tidal breathing, all you need is the diaphragm muscle.
You need to learn the rules of English grammar to be able to correct sentences.
NO
Most sentences will not need both "and" and "then" in order to be a complete sentence. Either "and" or "then" can be used to join sentences together when needed.
An infant in need of CPR will show no movement, breathing, or a pulse.
When we need more strength our breathing is faster so we can take some rest and breathe slowly.
Well without breathing, we wouldn't be alive. We need oxygen for our cells to carry out cellular respiration, and we need to get rid of the carbon dioxide it produces. Some organisms can get on living without "breathing", but as organism with lungs, breathing is vital.
An infant in need of CPR will not be breathing and will not have a pulse. Also, the infant will be turning a blueish color.
Breathing Supplies Your Cells With The Oxygen They Need.