Human circulatory system
Human Circulatory System
The Human Circulatory System (pronunciation: /ˈhjuːmən ˌsɜːkjʊˈleɪtəri ˈsɪstəm/) is a complex network responsible for the transportation of blood, oxygen, and nutrients throughout the body.
Etymology
The term "circulatory system" is derived from the Latin word "circulatorius", meaning "going in a circle". The term "human" is from the Latin "humanus", meaning "of man".
Structure
The Human Circulatory System is primarily composed of the Heart, Blood Vessels, and Blood.
- The Heart is a muscular organ that pumps blood throughout the body. It is divided into four chambers: the left and right Atria and the left and right Ventricles.
- Blood Vessels are the channels through which the blood is distributed throughout the body. They are categorized into Arteries, Veins, and Capillaries.
- Blood is the fluid that carries oxygen, nutrients, and waste products. It is composed of Red Blood Cells, White Blood Cells, Platelets, and Plasma.
Function
The primary function of the Human Circulatory System is to transport oxygen, nutrients, and hormones to cells throughout the body and remove waste products like carbon dioxide. The Heart pumps the Blood, which travels through the Blood Vessels.
Related Terms
- Cardiovascular System: Another term for the circulatory system, often used when referring to the heart and blood vessels specifically.
- Hematology: The branch of medicine that deals with the study of blood, blood-forming organs, and blood diseases.
- Cardiology: The study of the heart and its functions in health and disease.
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