Circulatory System Speech

1107 Words5 Pages

sara zawadka
Instructor’s Name
22 February 2018

the circulatory system speech the intro

the circulatory system is one of the most important systems in the body, there is also the respiratory, digestive, excretory, nervous and endocrine system, as they all support each other keeping the human body nourished and healthy. however the circulatory is one of the main organ systems in the body as it ensures that the exchange of substances between tissues of the body and the external and transport of nutrients of different substances from one organ to another such as amino acids ( which are building blocks for protein ) and electrolytes as well as oxygen, carbon dioxide, hormones and blood cells

the heart the heart which is typically …show more content…

Oxygenated blood is pumped away from the heart to the rest of the body, while deoxygenated blood is pumped to the lungs where it is deoxygenated before returning to the heart.

the

The aorta is the largest artery in the body. The aorta begins at the top of the left ventricle, the heart's muscular pumping chamber. The heart pumps blood from the left ventricle into the aorta through the aortic valve. Three leaflets on the aortic valve open and close with each heartbeat to allow one-way flow of blood.
The aorta is a tube about a foot long and just over an inch in diameter. The aorta is divided into four sections:
• The ascending aorta rises up from the heart and is about 2 inches long.

The coronary arteries branch off the ascending aorta to supply the heart with blood.
• The aortic arch curves over the heart, giving rise to branches that bring blood to the head, neck, and arms.
• The descending thoracic aorta travels down through the chest. Its small branches supply blood to the ribs and some chest structures.
• The abdominal aorta begins at the diaphragm, splitting to become the paired iliac arteries in the lower abdomen. Most of the major organs receive blood from branches of the abdominal …show more content…

In developed countries, the two leading causes of death, myocardial infarction (heart attack), and stroke may each directly result from an arterial system that has been slowly and progressively compromised by years of deterioration.

An artery is a vessel that carries blood away from the heart and toward other tissues and organs. Arteries are part of the circulatory system, which delivers oxygen and nutrients to every cell in the body.

artery walls have 4 layers in the centre there is the basement membrane then tunica intima and tunica media and finally the tunica internal

how are the heart and the lungs connected

The veins also are major blood vessels connected to your heart. The pulmonary veins carry oxygen-rich blood from the lungs to the left side of the heart so it can be pumped to the body. The superior and inferior vena cavae are large veins that carry oxygen-poor blood from the body back to the heart.

so step by step ill explain how this all comes together

Step 1
Blood enters right atrium from superior and inferior vena cavae.

Step 2
Blood in right atrium flows through right AV valve (tricuspid) into the right

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