Questions About The Five Body Systems

Explanation
The heart is the main organ of the circulatory system because it is responsible for pumping blood throughout the body. It receives oxygenated blood from the lungs and pumps it to the rest of the body, delivering oxygen and nutrients to the cells. It also collects deoxygenated blood from the body and sends it to the lungs for oxygenation. Without the heart, the circulatory system would not function properly, and the body would not receive the necessary oxygen and nutrients for survival.

Explanation
Blood pressure is highest when blood is flowing toward and to the body because this indicates that the heart is pumping blood efficiently and effectively throughout the circulatory system. When blood flows toward the body, it means that it is being pushed from the heart to the various organs and tissues. Similarly, when blood flows to the body, it indicates that it is being delivered to the different parts of the body, supplying them with oxygen and nutrients. Therefore, the combination of blood flowing toward and to the body signifies a healthy blood circulation and consequently, higher blood pressure.

Explanation
The brain is the main organ of the nervous system because it is responsible for controlling and coordinating all the functions of the body. It receives and processes information from the senses, controls movement, regulates bodily functions, and is the center for thoughts, emotions, and consciousness. Without the brain, the nervous system would not be able to function properly, and the body would not be able to perform essential tasks for survival.

Explanation
The lungs are the main organ in the respiratory system. They are responsible for the exchange of oxygen and carbon dioxide in the body. When we breathe in, the lungs take in oxygen from the air and deliver it to the bloodstream. At the same time, they remove carbon dioxide, which is a waste product, from the bloodstream and exhale it out of the body. The lungs have a complex structure with millions of tiny air sacs called alveoli, where the actual gas exchange takes place. Without the lungs, the respiratory system would not be able to function properly.

Explanation
The given list consists of different names, including "Abdullah Al-Farsi", "Othman", "Najoud", "Mr. Ron", and "Mr.Ron". The correct answer is "Mr. Ron, Mr.Ron" because it is the only name that appears twice in the list. The repetition of the name suggests that this person is considered the greatest among the given options.