The hormone belonging to the parathyroid gland is the parathyroid hormone, which is produced in the main cells of the parathyroid glands. The parathyroid hormone plays an important role in the calcium balance. It does this through the influence of the hormone on bones
Eicosanoids are hormones that act as nerve transmitters and modulators of the immune system. These hormones also have a role to play in inflammatory processes. The eicosanoids include prostaglandins and prostacyclines
The aortic valve separates the main artery (aorta) from the left ventricle. The aortic valve is a pocket valve and consists of three pockets. The aortic valve acts as an outlet valve for the heart and prevents the blood from flowing back out of the aorta
Neurotransmitters are messenger substances that generate a signal at their destination and enable communication between the cells. If there is a deficiency or excess of a transmitter, diseases such as Alzheimer's, schizophrenia or Parkinson's disease occur
The pulmonary valve lies between the large pulmonary artery (Truncus pulmonalis) and the right main chamber of the heart. The pulmonary valve is a pocket valve and consists of three pockets. It prevents the blood from flowing back out of the pulmonary artery
The blind spot is the area in the visual field of each eye where there are no sensory cells that can receive light. This is where the optic nerve exits through the retina. The position and effects of the blind spot can be easily identified by anyone
The tasks of the kidneys are very diverse. Its primary task is to produce urine. But it also plays a decisive role in regulating the electrolyte and water balance, the acid-base balance, blood pressure, and hormone production
The human spine consists of vertebrae and intervertebral discs. Man has i. d. R. 33 vertebral bodies. The vertebral bodies of the cervical spine, thoracic spine and lumbar spine remain mobile, while the sacrum and stony
The most common stomach diseases include gastritis and stomach cancer. Gastritis is a chronic inflammation of the stomach lining that can be triggered autoimmune, bacteria or medication. Stomach ulcers can be a result of this
The primary function of the uterus is to house the fetus during pregnancy and to expel it at the end of it. In addition, the sperm reach the fallopian tube through them, where fertilization also takes place.
The sinus node is the heart's primary electrical pacemaker and is largely responsible for the heart rate and arousal. In healthy people, the sinus node works at a frequency of about 60 to at rest
The term bone density describes the ratio of bone mass to bone volume. Bone density measurement is especially important for the diagnosis of osteoporosis (bone loss), but the bone density can also be used in various other cases
A muscle fiber is the smallest unit of a skeletal muscle. There are two different types of muscle fibers, slow-twitch or type 1 fibers and fast-twitch or type 2 fibers. A common injury, especially to the calf muscles
The pleura surrounds the lungs and the ribs and thus represents a movable layer, which on the one hand ensures a stable negative pressure so that the lungs do not collapse, and on the other hand the friction between the ribs and the lungs during volume changes
The hand muscles can be divided into the ball of the thumb, the metacarpus and the ball of the little finger. They are all innervated by either the median or ulnar nerve. It mainly serves the fine motor skills, so that all everyday
In trisomy 13, a third chromosome 13 is present. This leads to a number of malformations of the internal organs. The prognosis is very poor, and the majority of the affected fetuses die intrauterine.
Turner syndrome is the absence or dysfunction of the second X chromosome in girls. Typical symptoms are short stature and infertility. Symptomatic therapy consists of the substitution of growth hormones
The physique is primarily defined as our external appearance. There are several classification methods for different body types. Most people, however, are of mixed types. The physique and appearance of one also change
The human joints are divided into real joints and fake joints.The real joints are always separated by the joint space, while in the case of fake joints the joint space is missing and is filled with a filling tissue. Next differs
The sacrum (os sacrum) is a wedge-shaped bone at the bottom of the spine. The os sacrum consists of five vertebrae that are connected to one another in adults. Often there are low back pain that is painful for various reasons
