Why is it important that are cardiac and smooth
muscles contract involuntarily?

These muscles push materials like food or blood through organs. In contrast to skeletal muscle, smooth muscle can never be heavily influenced by you. Cardiovascular muscle is likewise a compulsory muscle, discovered uniquely in the heart. The heart muscle strands all agreement together, creating enough power to push blood all through the body

Explanation:

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.