A worn out horse is a hack or a jade
Nag is another word used
nag
broken
A Bronco.
legs
The horse fell on him.
A mare! A female horse is a mare, a male is a stallion, basically. However, a "baby" horse is a foal, a young male is a colt and a young female a filly. If a male horse is castrated it is then known as a gelding.I hope you were talking about horses - mare means sea in several languages, and that's a whole new topic.
broken
A Bronco.
cows intestine, broken down horse hooves
Divisible.
Dismount.
hydrolysis
Simple molecules are further broken down in cells in a process called catabolism.
legs
hippo (from the Greek) - horse potamos (from the Greek) - river
Sedimentary, but technically all rocks can be broken down into Soil by a process called 'Weathering'
ATP
Carbohydrates are generally broken down into glucose which your cells use as fuel. They can also be broken down into fructose and galactose.