In the body, there are many organs, and a number of them work in tandem to do certain things. These organs work together to form what's known as a system. Examples of systems include the respiratory system, the circulatory system, and the digestive system.
Organelle
Fitness.
complex
tissue
An organism with more than one part to it is called a complex organism or multi cellular organism
multicellular organisms
an organ
it has more cells.
A group of organ systems is called an organism. Organ systems work together to support the functions of the body, allowing the organism to maintain homeostasis and carry out necessary processes for survival.
The juxtamedullary complex is also called the juxtaglomerular capsule, and it functions in the kidneys to do filtration. Another name for it is the Bowman's capsule.
Organism
tissue