From left to middle to right.
Left
Pulmonary Artery
Vena Cava
Right Atrium
Right Ventricle
Pulmonary Artery
Hepatic Vein
Renal Vein
Middle
Head And Arms
Lungs
Liver
Digestive system
Kidneys
Sex Organs and Legs
Right
Aorta
Left Atrium
Left Ventricle
Pulmonary Vein
Hepatic Artery
Hepatic Portal Vein
Renal Artery.
In this form, oxygen is transported from the lungs to the many cells of the body.
Red blood cells are bi-concave so it can have a larger surface area, therefore gases can diffuse in and out of the cell much more easily.
White Blood Cells
Some white blood cells are phagocytes. These attack bacteria by engulfing them and ingesting them. This is called phagocytosis.
Some whit blood cells are called lymphocytes. These produce antibodies to kill bacteria. They are chemical compounds which can fight infection.
Phagocytes have nucleus’s that are like sausages (lobed). Lymphocytes have big circular nucleae.
Platelets are FRAGMENTS of cells which are involved in blood clotting.
When an injury occurs, the platelets release chemicals which convert fibrinogen (soluble) to fibrin (insoluble).
Fibrin is the substance that forms the main part of the cell.
Arteries, Veins and Capillaries.
Blood flows around the body enclosed within blood vessels.
Since blood is enclosed within these vessels at all times we have what is commonly known as a closed circulatory system.
Some organisms have an open circulatory system where blood flows freely around their bodies and is not contained within the blood vessels.
The human body contains 3 types of blood vessel; arteries, veins and capillaries.
Arteries divide into smaller structures called arterioles which further divide into smaller structures eventually leading to capillaries.
As blood flows through the capillaries, the capillaries expand into larger structures called venules and there eventually enlarge to become veins.
These structures pass close to all the major organs and tissues of the body and capillaries are widely spread so that every single cell in the body is in close proximity to a blood capillary.
The capillaries are the site of exchange of materials, e.g. oxygen, carbon dioxide and useful products of digestion and waste products.
Table and Differences between arteries and veins.
Difference in function
