Clockwise from left:
Rover Environmental Monitoring Station (REMS); Mast Camera (Mastcam); Chemistry and Camera (ChemCam); rover low-gain (RLGA) antenna; Dynamic Albedo of Neutrons (DAN); mobility system (wheels and suspension); Radiation Assessment Detector (RAD); Mars Descent Imager (MARDI); turret with tools at the end of the robotic arm; and robotic arm. Two science instruments — Chemistry and Mineralogy (CheMin) and Sample Analysis at Mars (SAM) — are inside the body of the rover.
From NASA/JPL