The Cardiovascular System
The cardiovascular system can be divided into four main parts: 1) The respiratory system; 2) The Heart; 3) The Blood; 4) The Blood vessels
The Respiratory System
The respiratory system consists of the nasal cavity , the pharynx, the larynx, the trachea, the bronchi, and the lungs (the main organ of respiration ).
The Cardiovascular System: The heart
The heart is a four chambered muscular pump, about the size of a clenched fist, and is responsible for pumping blood around the human body.
The Cardiovascular System: Blood
Blood is made up of a number of different cells (red blood cells and white blood cells), fragments of cells, various nutrients and hormones and liquid. An adult will have about 9 pints of blood within their body.
The Cardiovascular System: Blood Vessels
Blood vessels are responsible for the transport of blood, fluids, and hormones around the body. There are three main types of blood vessels: 1) Arteries; 2) Veins; 3) Capillaries.