What is the large flat muscle that separates the thoracic cavity from the abdominal cavity? intercostal muscles inferior lob diaphragm

Thoracic diaphragm

Explanation:

Thoracic diaphragm is the large muscle that separates the chest cavity from the abdominal cavity

i agree d is most definitely correct!

if you think your dog may have been exposed to a toxin, the best thing to do is to check the label of the item you think your pet ingested. read the information about toxicity. often, but not always, the information on packaging regarding children is relevant to dogs and some manufacturers even discuss dog toxicity. if there is an 800 number on the package – call them! it’s also recommended that you call your veterinarian to confirm the recommendations. if you go to your veterinarian, take all packaging and any information you have on the product.