The excretory and digestive systems
The digestive and excretory systems work together by gathering nutrients from food and processing waste out of the body. Each system does its portion of the workload.
liver
The digestive system or the excretory system.
digestive system
kidney
digestive and excretory
they are all systems
digestive and excretory
The cloaca is a chamber that receives products from the digestive, urinary and reproductive systems. The cloaca serves as the sole posterior opening and is found in amphibians, birds and reptiles.
Muscles are in many body systems (respiratory, cardiac, digestive, excretory systems), but all muscles specifically belong to the muscular system.
Mammals have nervous, digestive, circulatory, skeletal, immune, muscular, integumentary, and excretory systems.