Synonym radial artery Definition The pulsating artery is an arterial vessel. It therefore carries oxygen-rich blood. It runs along the forearm and branches out into a delicate arterial network in the palm. Anatomy of the pulmonary artery In the area of the crook of the arm the A. brachialis (arm artery) branches out into two … Pulse artery
Pain in the pulmonary artery Pain in the area of the pulmonary artery (A. radialis) often has nothing at all to do with the pulmonary artery, despite its localization. Sudden pulling, stabbing pain on the outside of the forearm usually indicates muscle pain. Muscle pain can often occur in the context of stress and lead … Pain in the pulmonary artery | Pulse artery
Definition When we talk about capillaries (hair vessels), we usually mean the blood capillaries, although we must not forget that there are also lymph capillaries. Blood capillaries are one of three types of vessels that can be distinguished in humans. There are the arteries that transport the blood away from the heart and the veins … Capillary
Structure of capillaries The structure of a capillary resembles a tube. The diameter of a capillary is about five to ten micrometers. Since the red blood cells (erythrocytes) that flow through the capillaries have a diameter of about seven micrometers, they must deform somewhat when they flow through the small blood vessels. This minimizes the … Structure of capillaries | Capillary
Functions of capillaries The function of the capillaries is mainly mass transfer. Depending on where the capillary network is located, nutrients, oxygen and metabolic end products are exchanged between the bloodstream and the tissue. Nutrients are supplied to the tissue, waste products are absorbed and carried away. Depending on the oxygen requirement of a particular … Functions of capillaries | Capillary
Capillary effect – what is that? Capillary effect is the term used to describe the behavior of liquids in which they are pulled upwards in a thin tube against gravity, for example. If you place a thin glass tube vertically in the water, you can observe how the water in the tube moves a little … Capillary effect – what is that? | Capillary
The endothelium is a single-layer layer of flat cells that lines all vessels and thus represents an important barrier between intravascular and extravascular space (as the space inside and outside the blood vessels). Structure The endothelium forms the innermost cell layer of the intima, the inner layer of the three-layer wall structure of an artery. … Endothelium
Classification The endothelium can be divided into different basic types. The different types depend on the function of the organ. The structure has a strong influence on the permeability of the endothelium (endothelial permeability) for the substances found in blood and tissue. The closed endothelium is most common. Among others, especially in capillaries and other … Classification | Endothelium
Malfunctions Various risk factors such as arterial hypertension, increased cholesterol levels and especially nicotine consumption seriously alter the function of the intact endothelium. One speaks then of an endothelial dysfunction. For example, oxidative stress can alter the nitric oxide mechanism and highly toxic metabolites are formed which can damage the endothelium. Endothelial damage is the … Malfunctions | Endothelium
The vena cava is the name given to the two largest veins in the human body. They collect the venous, low-oxygen blood from the body periphery and lead it back to the heart. From there it returns to the lungs, where it is enriched with oxygen before being pumped back into the body’s circulation. In … What is a vena cava?
Definition The lymph (lat. lympha = clear water) is a watery light yellow liquid, which is located in the lymphatic vessels. The lymph is a tissue fluid pressed out of the blood vessels. The many individual lymph vessels and lymph nodes are collectively known as the lymphatic system and, along with the bloodstream, are the … Lymph
Function of the lymph The lymphatic system serves primarily to transport larger substances that cannot pass through the capillary wall back into the blood vessels. These include in particular fats (lipids) and proteins. On the other hand, the lymphatic system is an important part of the immune defence. It transports foreign bodies and germs to … Function of the lymph | Lymph