An exposure pathway-describes a unique mechanism by which an. individual or population is exposed to chemical or physical agents at or originating from. a site. Each exposure pathway includes a source or release from a source, an exposure. point, and an exposure route.
Terminology: Young cattle are called calves. A young male is called a bull calf; a young female before she has calved the second time is called a heifer (pronounced heffer). A young female that has had only one calf is sometimes called a first-calf heifer..
1 Heifer is a female bovine that has not had a calf. 2  Heifer calf is a female calf. 3  Steer is a castrated male bovine or can be a future ox that is less than 4 years old. 4  Ox is castrated bull that has been trained to work and is at least 4 years of age.ivestock are animals kept by people for use or pleasure. 1  Bovine is a term relating to cattle. 2  Caprine is a term relating to goats. 3  Equine is a term relating to horses, mules, zebras, and asses. 4  Herd is a grouping of a single species of livestock. 5  Ovine is a term relating to sheep. 6  Porcine is a term relating to swine.