Erythropoietin is produced naturally in the body, mostly by the kidneys. It gives bone marrow the signal to produce red blood cells, which carry oxygen in the blood.
Erythropoietin is produced naturally in the body, mostly by the kidneys. It gives bone marrow the signal to produce red blood cells, which carry oxygen in the blood.
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
Circulatory System.
The eye contains the Retina
The skin is part of the Integumentary System, and is the largest organ in the body.