The retina is in the eye.
The eye contains the Retina
Nervous system
The retina of the eye has rods and cones.
The genitourinary system.
The retina is the part of the eye that contains light receptors.
The digestive system contains the liver.
Circulatory System
The olfactory system.
the digestive system
Digestive system.
skeletal system
Circulatory System.