William Harvey
The portal system is another way of saying the circulatory system. The portal system is how blood travels in the veins throughout the human body as well as how it gets oxygen in the bloodstream..
The difference between a human-made system and a "natural" system will depend entirely on what the system is. In many cases the human system will be simpler and have a narrow focus.
The twelve system of the human body are Skeletal System, Muscular System, Circulatory System, Exretory System, Nervous System, Digestive System, Resperatory System, Reproductive System, Immune System, Lymphatic System, Integumentary System and the Endocrine System.
Human body systems include: the nervous system, the digestive system, the circulatory system, the immune system, the integumentary system.
Can a human work as information system how?
A human nervous system is much more complex. Unlike a human a jellyfish does not have a central nervous system.
there elevensystems in the human body : muscular system , respiratory system , and the others. There are ten systems in the human body. These systems include the Circulatory System, the Dermal System, the Digestive System, The Glandular System, the Excretory System, the Muscular System, the Nervous System, the Reproductive System, the Respiratory System, and the Skeletal System.
human-made: telephone system, city transit system, human digestive systemnatural-made: water purification system, solar system, plant root system
in the human body, it is the excretory system!
It is in the skeleton system.
The Nervous System
Two divisions in the human nervios system are the peripheral nervious system and the central nervious system