What type of circulatory system does chordates have?

In chordates, the circulatory system is of a closed type. Their heart is located under the dorsal cord and digestive tube, where the abdomen is.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.