The retina is in the eye.
The eye contains the Retina
Nervous system
The retina of the eye has rods and cones.
The retina is the part of the eye that contains light receptors.
The genitourinary system.
The digestive system contains the liver.
Circulatory System
The digestive system contains the small intestine. It is a vital organ for nutrient absorption in the body.
The olfactory system.
Digestive system.
the digestive system
skeletal system