Sunday, James and I were finally able to bake cookies. I had previously told him three times that we would make cookies. Something always came up…like not having the right ingredients…or softened butter…etc. So Sunday after his nap we starting our first cookie baking adventure together. I sat him in his booster chair with a […]
Cardiac Cycle Phases:
-Blood goes into Ventricle, AV valves open, SL valves closed
-Ventricles contract, AV valves close, pressure increases, begins to open SL valves
-SL valves open, blood is ejected to pulmonary and systemic circulations
-All 4 valves closed, atria full with blood, intraventricular pressure decreases
-Pressure in atria increases, AV valves open and ventricles fill
There are three types […]
An electrocardiogram is a non-invasive diagnostic tool. It can record the electrical changes that accompany each cardiac cycle (heartbeat). The heart generates an electrical current from impulse conduction. This can be detected at the surface of the body. The ECG helps to determine if the conduction pathway is abnormal, if the heart is enlarged, and […]
Cardiac muscles are branched, intercalated discs with gap junctions. They are involuntary, striated and have a single central nucleus per cell.
The Conduction System of the Heart
Pacemaker cells at the sinoatrial node (SA) fire spontaneously and act as a pacemaker. They form the conduction system for the heart. The SA node sets the pace since it […]
Systemic Circulation
The left side of the heart pumps blood throughout the body. The left ventricle pumps oxygenated blood into the aorta. The aorta branches into many arteries that travel to organs. The arteries branch into many arterioles in tissue. The arterioles branch into thin-walled capillaries for exchange of gases and nutrients. Deoxygenated blood begins its […]
The heart pumps over 1 million gallons of blood per year. It contains over 60,000 miles of blood vessels. There are three layer of the heart wall; epicardium, myocardium, endocardium, The epicardium is a visceral layer of serous pericardium. The myocardium is a cardiac muscle layer and is the bulk of the heart. The endocardium […]
There are two fluids that service the cells of the body; blood and interstitial fluid. Blood is composed of plasma and a variety of cells. It transports nutrients and wastes. Interstitial fluid bathes the cells of the body. Nutrients and oxygen diffuse from the blood and the interstitial fluid and then into the cells. Wastes […]
Well it’s not really new but it’s pretty nice. The poor little guy has been sleeping in a pak-n-play until now. James always seemed uncomfortable in it when he was a baby so I felt bad keeping Matthew in it. I was hoping James would be using his toddler bed by now but he still […]
Today was the 20th Annual Carolina Blood Drive. I received an email about it about two weeks ago and signed up. Their goal was to receive 1200 units of blood. Last I heard they had received 650. I will be curious to see if they met their goal.
The Red Cross had everything very organized. The whole process took about […]
Postural control is the ability to maintain upright position in the field of gravity and the ability to maintain the total body center of mass within the base of support. The body’s base of support is when limited areas permit frequent excursion outside the limits of stability. The force associated with limb movement is sufficient […]
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