Question

From what the organs and organ systems are made of?

Answer 1

Hint: When a group of these are joined together in a structural unit to provide a common purpose is known as an organ. These exist in most of the multicellular organisms, involving not just human beings and other animals but plants too. Organ system is formed when they are functionally related. They work together to perform complicated, connected functions, with each organ concentrating on a subcategory of the task.

Complete answer:
In the human body an organ is composed of various histological kinds of tissue that act together to perform a complex function.
Cells 🡪 tissues 🡪 organs 🡪 organ systems.
An organ system involves a group of organs that play complex functions essential for the existence of an organism. Every now and then an organism can stay alive with a damaged or non-functioning organ. However, when an entire system of organs collapses, the existence of the organism is compromised. Thus, the organ systems perform tasks together to sustain a continuous inner environment called homeostasis inside the body to make sure of the existence of the organism.

These are some organ systems human body has:
- Skeletal system
- Muscular system
- Nervous system
- Endocrine system
- Circulatory system
- Respiratory system
- Digestive system
- Urinary system
- Reproductive system

Note:
Human beings and many other complex multicellular organisms have systems made up of organs that work collectively, carrying out processes that maintain our lives. The body has stages of organization that build upon each other. The role of an organ system hangs on the combined activity of its organs. For example, digestive system organs help to deal with food.