Answering the question, the human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system. This implies the correct answer is D
Further Explanation
The human circulatory system is made of 3 important systems, which include:
- The heart
- The lungs
- The blood vessels, which are arteries, veins, and capillaries
The cardiovascular system is responsible for the movement of blood, oxygen, nutrients and also hormones in individual body cells.
The major functions of the circulatory system are to convey nutrients, oxygen and hormones to and fro the body cells. Another function of this system is that it removes waste product such as carbon dioxide and other wastes and move then to the excretory organs, where they are excreted out of the body.
Simply put, the four core functions of the cardiovascular system are as follows:
- The cardiovascular system is responsible for the transportation of oxygen, gases, and nutrients throughout the body
- The cardiovascular system protects the body from blood loss after injury and also against infection; it defends the body against toxins and foreign microbes
- It helps to regulate and also to maintain the body temperature
- It is also responsible for maintaining fluid balance throughout the body
LEARN MORE:
- The human cardiovascular system is considered closed because https://brainly.com/question/1863991
- The human cardiovascular system is considered closed because https://brainly.com/question/2752608
KEYWORDS:
- cardiovascular system
- veins
- blood
- temperature
- wastes
- toxins
