167k views
0 votes
The human cardiovascular system is considered closed because __________.

User Egimaben
by
8.1k points

2 Answers

4 votes
Vertebrates, and a few invertebrates, have a closed circulatory system. Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.
User TheStranger
by
8.7k points
4 votes

Answer:

There are no holes for blood to enter or leave the system

User Caqu
by
8.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.