Sinoatrial node

symptom of Lymphoma, enlarged lymph nodes or tumors of the lymph nodes, was first observed in the 17th century by an Italian biologist named Marcell Malpighi. (Lakhtakia & Burney, 2015). Very little more was observed about the disease until the 19th century, when Thomas Hodgkin, a researcher known as “inspector of the dead” due to the great number of autopsies he conducted, presented a paper on several patients with painless enlargement of their lymph nodes (Lakhtakia & Burney, 2015).…

Blood was thought to be the primary transporter of the immunity cells to and from the brain (Louveau et al., 2015). Previous studies had, in fact, discovered that the cerebrospinal fluid (CSF) was was transported to the deep cervical lymph nodes, but the mechanism was scantily understood (Louveau et al., 2015). Coincidentally, Dr. Kipnis and colleagues were trying to determine the route of immune cells’ entrance and exit from the CNS to the systemic circulation when they discovered the meningeal…

Typically; swelling of the lymph nodes in the neck, fever and infection, along with tiredness and fatigue, are some symptoms a person may experience with Chronic Lymphocytic Leukemia (Leukemia - National Cancer Institute. n.d.). In the early development stages of the disease, Chronic Lymphocytic…

lymphoma cells are in one lymph node group, or in the abdominal cells. In stage one there may be little to no symptoms, so it may escape detections in its early stages (National, Browley). In stage II the lymphomas are in at least two lymph node groups, either above or below the diaphragm, or in one part of an organ and the lymph node(s) near that area. There are more apparent symptoms now (National, Browley). In the third stage of NHL the lymphoma is in the lymph nodes above and below the…

Lymphoma is a type of cancer in the blood the presents itself the lymph system. With lymphoma, white blood cells become malignant and start to multiply and spread abnormally. There are two major types of lymphoma. The first is Hodgkin’s lymphoma and the other is non-Hodgkin’s lymphoma. There are few ways to treat lymphoma, and with these treatments, sometimes cure it. Hodgkin’s lymphoma is cancer of the lymphatic system, more commonly known as the immune system. When the cells in the lymphatic…

The lymphatic system consists of lymphatic capillaries and vessels, lymph nodes, the spleen, the thymus, the tonsils, and lymph itself. Some of the fluid that is deposited into the tissues from the blood is taken up by lymphatic capillaries where it becomes lymph. Lymphatic capillaries and vessels have valves that prevent back flow, ensuring one-way flow of lymphatic fluids. Lymphatic capillaries eventually converge to form lymphatic vessels, which are similar in comparison to veins. Lymphatic…

AIDS-related lymphoma is a broad term for a group of blood cancers that, as its name implies, affects AIDS patients. There are various types of non-Hodgkin lymphomas (NHLs) that this category encompasses, so it is not as clear-cut as one might imagine. AIDS-related lymphomas are very complex diseases with many factors to consider. It is important to understand the origin of AIDS-related lymphoma. According to the article “AIDS-Related Malignancies,” AIDS-related lymphoma is believed to be…

generated by a group of cells located in the upper chamber of the heart. This special pathway is as follow: the sinoatrial node, atrioventricular node, his-purkinje network. The impulse starts in a small bundle of specialized cell which is known as the sinoatrial node located in the right atrium. The sinoatrial node sets the rate and rhythm of the heartbeat. The atrioventricular node slows the electrical signal before it enters the ventricles. It is located in the center of the heart…

It is a highly efficient organ and constantly works to keep our blood circulation going and ourselves alive. The high efficiency of the heart pumping system originates in a conductive system, which is linked to the Sinoatrial (S-A) and Atrioventricular (A-V) node. The Sinoatrial node, also known as the natural cardiac pacemaker, is located in the upper part of the right atrium and initiates the contractions of the cardiac muscle by producing special electrical impulses which act as an…

the lungs and enters the left atrium and the left ventricle then it leaves through the aorta then travels to the rest of the body. In the heart beat there is sinoatrial nodes, atrioventricular nodes, bundles of his, and perkinje fibers. Sinoatrial nodes are a small muscle in the heart that produces some kind of signal. Atrioventricular nodes act as a relay station that controls the heart rate. Bundles of his muscles that also regulate the heartbeat and finally perkinje fibers they send impulses…