Nervous system and Endocrine system.
the brain and the liver
the endocrine and nervous systems
Hypothalamus and pituitary gland.
The nervous and endocrine systems bear the major responsibility for ensuring homeostasis.
nerbous and endocrine
Organ systems are most complex and fragile starting with the atoms. The most complex organ systems is the organism. In between are the molecules, cell, tissue, organ, and organ system.
endocrine and excretory system
the outer membrane
Endocrine, integumentary, nervous, cardiovascular, and either digestive or respiratory.
All organ systems regulate homeostasis for the body. I'm not sure which two are the most important. For example, the Regulatory System (lungs, trachea, etc.) regulate homeostasis by breathing. The Excretory System (Kidney, bladder, etc.) regulates homeostasis by removing wastes.
The nervous and endocrine systems bear the major responsibility for ensuring homeostasis.
nerbous and endocrine
Organ systems are most complex and fragile starting with the atoms. The most complex organ systems is the organism. In between are the molecules, cell, tissue, organ, and organ system.
Body systems, organs, tissues, cells
The Kidneys
endocrine and excretory system
kidneys
cells to tissues to organs to organ systems to organisms... cells to tissues to organs to organ systems to organisms...
the outer membrane
The circulatory system is only indirectly involved with creating homeostasis. Homeostasis is controlled by several systems including the nervous system and the endocrine system and most other organs. These systems depend on the circulatory system but are controlling the release of hormones, increase in blood flow, regulation of fluids in the blood, etc.