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What the most important the circulatory and respiratory systems or the digestive system and why?
Well, it depends on the organism an the requirement. If you talk about lower organisms like poriferans they don't have circulatory system, respiratory system neither digestive system, simple diffusion occurs in their body as they do not need such system because of their environment and simplicity of development.
If you consider flat worms (platyhelminthes) they have a low digestive system but lack any circulatory system as their cells are enogh close to the environment simple diffusion fulfills the respiratory requirement.
The need, importance and significance increases with the complexity of an orgnism.
As the man is most complex each system is really important. Without digestive system you can't make food simple,without respiratory system you can't yield energy, without circulatory system you can't supply energy or nutrients to the cells at distances.
Hope you've got the answer of the question :)
What else can I help you with?
Which body systems are involved in respiration?
respiratory system Circulatory system
Are veins circulatory sytems digestive sytems or respiratory systems?
The veins are found in the circulatory system.
What type of circulatory systems do jellyfish have?
Most jellyfish do not have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems.
What are three systems of your body?
The digestive system, respiratory system, circulatory system
What do the digestive respiratory circulatory and excretory have in common?
they are all systems
What body systems work together to bring nutrients to the cells?
the digestive system and the respiratory system, or the lymphatic system and the endocrine system, or the digestive system and the cardiovascular system, or the endocrine system and the cardiovascular system
What is the jellyfish circulatory system?
Most jellyfish do not have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems.
What is the seven systems of the body?
Skeletal Nervous Circulatory Respiratory Immune Digestive Endocrine
What systems does the respiratory system work with?
Respiratory system works with digestive system ,circulatory system ,excretory system (indirectly through circulatory system...
What are some body systems connected to the circulatory?
The body systems connected to the circulatory system are 1. Respiratory system 2. Digestive system 3. Muscular system
Name 5 human body systems?
There are many different body systems for example, "Muscular, skeletal, reproductive, respiratory, and integumentary". The systems of the human body are the Digestive, Respiratory, Circulatory, Muscular, Skeletal, Reproductive, Nervous, and Excretory.
What the seven main organ systems of a vertebrate?
skeletal, digestive, excretory, respiratory, circulatory, nervous, and reproductive.
