Angiography

The circulatory system The circulatory system is responsible for the transport of water and dissolved materials throughout the body, including oxygen, carbon dioxide, nutrients, and waste.

The circulatory system The blood vascular system The lymph vascular system

The circulatory system is also known as the cardiovascular system. It consists of… 3. The Heart1. Blood2. Blood Vessels The Circulatory System

Blood vessels Series of “tubes” that circulate blood around the body Arteries carry blood away from the heart Capillaries allow for exchange of materials between the blood and the cells of the body Veins carry blood back to the heart

Circulatory Networks Heart is a double pump sending blood to 2 different locations. Pulmonary Circulation –Deoxygenated blood from Right Ventricle to lungs back to Left Atrium. Systemic Circulation –Oxygenated blood from Left Ventricle to the body tissues (Liver/Gut/Kidneys/Reproductive organs/Limbs) back to Right Atrium

Systemic Circuit Left Ventricle Aorta Arteries Arterioles Capillaries Venules Veins IVC & SVC Atrium, Right Ventricle.

Pulmonary Circuit Right Ventricle Pulmonary Arteries Lungs / Pulmonary Capillaries Pulmonary Veins Atrium, Right Ventricle.

List 5 things you know about the heart

Draw a picture of the heart

The Heart - Structure Right ventricle Septum (dividing wall) Tricuspid valve Vena cavae Aorta Right atrium Semilunar valves Pulmonary artery Pulmonary veins Left atrium Bicuspid valve Left ventricle Cardiac muscle

The Heart - Structure

Vascular System The vascular system is made up of five different types of blood vessels, What are they? How do they differ in size?

Vessel Anatomy Arteries and veins are composed of 3 layers or tunics –Tunica interna (innermost) –Tunica media (middle) –Tunica externa (outermost)

Capillaries are composed of a single tunic tunica interna

Capillaries Capillaries are the most numerous of the blood vessels and have the smallest diameter The exchange of materials between the blood and the cells of the body occur here The diameter of a typical capillary is 9 mm The endothelial cells of the capillary contain pores within the cells called fenestrations which allows for fluid (and small solute) exchange between the blood (plasma) and the tissues of the body (interstitial fluid) fenestrations act as a filter because they are TOO SMALL to allow RBCs, platelets and large plasma proteins (such as albumin) to leave the circulatory system

Capillaries

Fenestrations

Venous Return Mechanisms  Skeletal muscles  Respiratory Pump  Valves  Smooth muscle

Venous Return The movement of blood through veins is assisted by contraction of skeletal muscle veins located between skeletal muscles are squeezed during contraction

Blood Flow in Response to Needs

Vasoconstriction vs. Vasodilation

ANATOMY OF THE BLOOD VESSELS AORTA

Ascending aorta Aortic arch Descending aorta  Thoracic  Abdominal

Branches of the aortic arch  Innominate artery  Left common carotid artery  Left subclavian artery

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