What is the difference between Patents and Designs in IPR

Main abhi to confused hoon. Mere professor ne kaha hai ki design ka protection patent se kuch alag hai, lekin kya yeh sach hai? Mere friend ne kaha hai ki design ka protection 15 saal ke liye hota hai, par patent ka protection 20 saal ke liye hota hai. Mera problem yeh hai ki main dono ke beech kaafe confusion hai. Mera question yeh hai ki kya design ka protection patent se alag hai? Kyonki design ka protection patent ke liye 5 saal ka renewal hota hai, aur jyadatar cases mein design protection patent se aadharit hota hai. So, kya yeh sach hai ki patent aur design dono alag cheezein hain? Kripya mujhe thoda clear karein.