https://padlet.com/mike_lymmcf/2f0iib1wk750 Made with a stroke of good luck en-us 2018-12-03 09:49:00 UTC 2018-12-05 08:14:03 UTC hello@padlet.com https://padlet.com/mike_lymmcf/2f0iib1wk750/wish/310328079 The heart is a pump, like a pump will blow up our tyres on cars the heart pumps blood back out and around the bodies working muscles which provides energy and allows our body to function correctly. Our heart transports nutrients, oxygen and hormones. 
Chambers of the heart-
Our heart is hollow and is a muscular organ which works as a pump for movement of the blood the four chambers movement is monitored and spied on by the valves. Our heart valves function like one sided  doors which allow blood flow through in the forward direction but prevent the backward flow of blood. Venous blood returns from the body to the right side of the heart which pumps the blood to the lungs. The oxygen-rich blood returns from the lungs to the left side of the heart. The left side of the heart pumps blood to the entire body. As you would expect, the left side of the heart must generate a much greater pressure to pump the blood to the body. On the left side the valves are called mitral and aortic valves. The mitral valve connects the receiving chamber from the lungs, the left atrium, with the pumping chamber, the left ventricle. The aortic valve controls the flow of blood out of the heart into the aorta, the largest artery of the body which then gives rise to all the other arteries.
 The heart has four chambers: two atria and two ventricles. 

• The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. superior and inferior vena cava.
• The right ventricle pumps the oxygen-poor blood to the lungs.
•  The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
• The left ventricle pumps the oxygen-rich blood to the body.
• The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.

]]> 2018-12-03 09:55:36 UTC https://padlet.com/mike_lymmcf/2f0iib1wk750/wish/310328079 mike_lymmcf https://padlet.com/mike_lymmcf/2f0iib1wk750/wish/310329475 The heart and pulmonary circuit.  - blood carried from the heart from the network, 
pulmonary circuit blood from gas exchange from the lungs
Systemic circuit- to and from the rest of the body. 

Heart - pumps away by arteries also known as efferent vessels. 
returned by veins - afferent vessels. 

Microscopic  - Thin walled vessels called capillaries interconnect the arteries and the smallest veins

Their thin walls permit the exchange of nutrients and gasses and waste products between the blood and gas exchange. 

heart is a muscle  -Unlike most muscles the heart never rests. 

8000 litres of blood pumping round the body, 

working hard to keep us alive

thoracic cavity 

pericardial sac

Pericardium - this is the lining  of the cavity. imagine your fist pressing your fist against a balloon, the this represent the pericardium.

wrist represents the largest parts of the arteries and veins and vessels  

Pericardial cavity - visceral and peratieal - inner and out surface. 
contains pericardial fluid. Fluid is lubricant acting as shock absorber reducing heart friction between beats. Membrane's = 

pericarditis - is infection of the pericardium through pathogens and inflammation. 

inflammation leads to fluid, a scratching sound on the heart, and this restricts movement. 

cardiac tamponade - heart ciondition

The heart wall - three distinctive outer layers. 

the epicardium is the visceral pericardium - outer cardinium of the heart. Serus membrane mesothelium areolar connective tissue that is attached to the myocardium. 

myocardinium - muscular wall of the heart. both atria and ventricles. 
both atria and ventricles.

Muscle tissue blood vessels and nerves. muscle bundle that wraps around the heart. 

These cardiac muscles wrap around the heart for more protection and create bundles of support around the atria that form figure of eights. 

endocardium is made up of a simple squamous epithelium. 








 




]]> 2018-12-03 10:00:14 UTC https://padlet.com/mike_lymmcf/2f0iib1wk750/wish/310329475 https://padlet.com/mike_lymmcf/2f0iib1wk750/wish/310340081 The coronary sulcas, is a deep groove, marks the border between the atria and the ventricles and the posterior inter-ventricles , and the shallower depressions which mark the boundary in the middle of our left and right ventricles.]]> 2018-12-03 10:43:57 UTC https://padlet.com/mike_lymmcf/2f0iib1wk750/wish/310340081