Which one(s) of the essential chemical elements (O, H, C, N) does blood contain?
It contains all of them.
I hope this helps. Thanks for asking.
To confirm which essential chemical elements are present in blood, you can consult a reliable source such as a biology textbook, medical website, or scientific research paper. These sources typically provide detailed information about the composition of blood.
To find this information online, you can perform a search using a search engine like Google or Bing. In the search bar, you can type in "elements present in blood" or "chemical composition of blood." This will provide you with various sources, and you can choose a reputable one to obtain accurate information about the presence of oxygen (O), hydrogen (H), carbon (C), and nitrogen (N) in blood.
Remember to critically evaluate the sources you find, looking for information from reliable and credible sources, such as academic institutions, scientific journals, or medical websites. This will ensure that you get accurate and trustworthy information.
If you have access to a biology textbook or academic resources, you can refer to them directly to find the information regarding the composition of blood.
I hope this explanation helps you in finding the answer to your question.