The answer is either B or C wish i had these Q? On my quizzes haha
An orphan drug is a pharmaceutical agent developed to treat medical conditions which, because they are so rare, would not be profitable to produce without government assistance. The conditions are referred to as orphan diseases.
Answer:
1.Respiratory system
2.Digestive system
3.Excretory system
4.Reproductive system
5.Nervous system
6.blood circulatory system
7.lymphatic system
8.skeletal system
Explanation:
My favourite pet is cat
A cat have all mentioned system except lymphatic i guess