Question

What are four facts about the circulatory system?

Answer 1

Hint: The circulatory system, also called cardiovascular system, is an organ that helps in the movement of blood to circulate and transport nutrients from the blood to each and every cell. It also removes toxic substances from the cell into the blood which ultimately excrete out through urine.

Complete answer:
The circulatory system is made up of the heart, blood vessels, etc., which pumps oxygenated blood from the heart to different blood vessels and the deoxygenated blood from the blood vessels to the alveoli of the lungs. The circulatory system carries nutrients, hormones, waste products, carbon dioxide, etc.
The two bottom chambers are the right ventricle and the left ventricle. These pump blood out of the heart. A wall called the interventricular septum is between the two ventricles.
The Iow bottom chambers of our heart are the right ventricle and the left ventricle and are separated through an interventricular septum which pumps blood out of the heart. The top chambers are called right atrium and left atrium and are separated through interatrial septum. They receive the blood entering the heart.

The average size of the heart is about the size of an adult.
It continues beating even when it is disconnected from the body.
The rhythm of our heart is being controlled by the electrical system.
Women's hearts beat faster than men's. Most heart attacks occur on Monday.

Note:
The heart gets stimulated when it pumps more or less blood. When we are asleep then the heart pumps just enough to provide adequate amounts of oxygen required by our body. But when we are doing exercises the heart pumps faster so that our muscles get more oxygen to perform its work.