The Circulatory System

3. A red coloured protein (Hb/Hgb) that can be found in red blood cells that carries oxygen from the heart and lungs to the rest of the body.
4. blood cell- A type of cell that is part of the immune system as is needed to fight off infections. They produce antibodies that help break down and destroy invasive pathogens.
6. muscle- An involuntary muscle that is found around the heart and never fatigues. Contains a higher number of mitochondria.
9. A condition that is often caused or due to an inadequate blood supply to the heart. Marked by severe pains in the chest and sometimes neck and shoulders.
11. A compound found in most blood tissue and all the cells in your body. It is needed for making cell walls, tissues, hormones and Vitamin D, but is often associated with heart diseases.
12. The many tubes forming part of the circulatory system in which carries oxygenated blood from the Aorta (heart) to all parts of the body.
13. Colloquially called blood clots, it impedes blood flow within the vascular system formed with platelets and red-blood cells.
15. blood cell- A type of cell that carries oxygen and carbon dioxide to and from your lungs and body. They have a flat shape that increases its surface area and no organised nucleus.

1. The smallest blood vessels in the body that connect the vessels that take blood away from the heart (arteries) and the vessels that return blood to the heart (veins).
2. The build-up of white blood cells and cholesterol, among other substances, in the walls of arteries, narrowing the artery and reducing the blood flow to the heart muscle (can cause Angina)
5. blood- Blood that is brought to the heart from the body through the right atrium, right ventricle up to the pulmonary artery, which is sent to the lungs.
6. system- The system vital to sustaining our body by supplying body with oxygen and nutrients while removing substances such as CO2.
7. The many 'tubes' forming part of the circulatory system, mostly acting as a transport system that takes oxygen-depleted blood towards the heart.
8. Large pieces of cells in the bone marrow that help form clots, heal wounds and to slow/stop bleeding.
10. The liquid substance of blood which acts as an transport medium for delivering nutrients to the cells of organs and taking substances for excretion.
14. blood- Blood that is brought to the heart from the lungs through the left atrium, left ventricle and up to the aorta, which distributes it to all parts of the body.