Cardiovascular System Physiology

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Anatomy and physiology of the cardiovascular system
Cardiovascular System
According to (smith.A2013).
The cardiovascular system includes the heart, blood vessels and also blood. Its role is to deliver nutrients and takes away any by-products from a person’s body. The cardiovascular system is the heart and it is a four-chambered pump that carries blood to the arteries these arteries then carries out clean and oxygenated blood to the tissue.

The blood
According to ( 2002).
Blood is the fluid that circulates in the vascular system of human beings and, in a humans blood is consisting of plasma in which the red blood cells, white blood cells and platelets are suspended.
Two Parts of the blood.
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Platelets do not contain a nucleus and can only survive in the body for a week and then a ‘Macrophages’ capture and digest them, platelets are also formed in the red bone marrow. (innerbody,2016)

The functions of blood
The bloods functions include:
Transportation – the blood carries other substances around the body inside the Arteries, Veins and Capillaries. The blood flows through the circulatory system and also dissolves gases such as oxygen and carbon dioxide.
Immunity and defence- white blood cells are cells that help fight infection. (Teachpe,2017).
Maintaining body temperature.
Destroys toxins from the body such as acids. (Ivy rose,2003)
Blood vessels
A blood vessel is a vessel in a human’s body in which blood circulates, Arteries carry the blood away from the heart and the very small branches are the Arterioles. The venules collect the blood from different organs, they unite to form veins.
The 5 types of blood vessels in the body are: (ref
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These small veins are called venules. Venules collect blood from capillaries and drain into veins.
5 - Veins are the blood vessels that carry blood back to the heart. They may contain valves which stop blood flowing away from the heart.
Describe the 3 main types of blood circulation? -

The three types main types of blood circulation are
1 - Systemic circulation
2 – Pulmonary circulation
3 – Portal circulation
These three systems work together for the proper oxygenation and blood flow throughout the body.

Systemic Circulation is when the network of vessels carry blood from the heart to the body and from the body back to the heart

Pulmonary Circulation is a network of vessels that carries blood to and from the lungs Portal Circulation is the network of arteries and veins that supplies blood to all the cells of the heart

Describe the cardiac cycle and blood pressure
Ref -
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