The primary internals of the Galaxy Nexus are held on two L-shaped boards. The small board on the left holds the vibrator motor and several connections. The large board on the right is the motherboard, which houses the volume buttons, SIM slot and the following chips:

Texas Instruments TWL6040 8-Channel High Quality Low-Power Audio Codec

Texas Instruments TWL6030 Fully Integrated Power Management with Switch Mode Charger

Invensense MPU-3050 Motion Processing Unit

Intel XG626 Baseband Modem

Bosch BMP180 MEMS Pressure Sensor