What are the endocrine glands? The endocrine glands in humans are production sites for important hormones. They do not have an excretory duct, but release their secretions (hormones) directly into the blood. This is why endocrine glands are called endocrine glands. Their counterparts are exocrine glands, which release their secretions via excretory ducts to internal … Ghiandole ormonali: struttura e funzione
What is hair? Hairs are long horny threads consisting of keratin. As so-called skin appendages, they form in the epidermis from the third embryonic month. There are three types of hair in humans: Lanugo hairs (downy hairs): fine, short, thin and unpigmented hairs that occur during the embryonic period and are shed by the 4th … Capelli: struttura, funzione, malattie
What are the facial muscles? The facial muscles are the muscles in the face that surround the eyes, nose, mouth and ears. Unlike other muscles of the body, they do not pull across joints from bone to bone, each with a tendon as an attachment point. Instead, the facial muscles attach to the skin and … Muscoli facciali (muscoli mimetici)
What is the ureter? Ureter is the medical term for the ureter. Each kidney has a ureter through which urine is transported: The renal pelvis in each kidney narrows downward to form the tubular ureter. The two ureters are each two to four millimeters thick and 24 to 31 centimeters long. They descend behind the … Uretere (tratto urinario): struttura e funzione
What is the colon? Bauhin’s valve marks the beginning of the colon in the right lower abdomen. It sits at the junction with the last section of the small intestine (ileum) and prevents intestinal contents from being forced from the colon back into the ileum. The large intestine first leads upward (to the underside of … Colon: funzione e anatomia
What is the spine? The spine is the bony axial skeleton that supports the trunk and enables its movements. It is straight when viewed from the front. Viewed from the side, on the other hand, it has a double S-shape: How many vertebrae does a human being have? The human spine consists of 33 to … Colonna vertebrale: struttura e funzione
What is the spleen? The spleen (splen, lien) is the largest lymphoid organ in the human body. It houses one third of the total lymphoid tissue. Unlike the lymph nodes, however, it is not involved in the lymphatic circulation, but in the blood circulation. The coffee bean-shaped organ is approximately thirteen centimeters long, eight centimeters … Milza (Splen, Lien): struttura e malattie
Mitral valve: inlet valve in the left heart. The mitral valve allows blood to pass from the left atrium to the left ventricle. Because of its location, it is considered one of the atrioventricular valves, along with the tricuspid valve. Like the other three heart valves, it consists of a double layer of the heart’s … Valvola mitrale – Struttura e funzione
What is the femur? Femur is the medical term for the thigh bone. It is a tubular bone and is divided into different sections: At the upper end, the spherical femoral head (caput femoris) sits slightly angled on a long neck (collum femoris), the femoral neck. Together with the socket of the pelvic bone, the … Femore: funzione, anatomia e malattie
Neck muscles In the front of the neck, two muscle groups attach to the hyoid bone at the top and bottom, thereby stabilizing it. Despite its name, this small bone does not belong to the skull but to the torso skeleton and serves as an attachment point for various muscles of the tongue, neck and … Muscoli del collo e del tronco
What is the structure of the nail? Finger and toe nails are corneal plates consisting of keratin. The smooth, transparent nail plate is fused with the underlying nail bed and flows into the free nail edge at the bottom. On the three other sides, the nail plate is bordered by the nail wall. The upper … Nails
What is the uterus? The uterus is a muscular organ in the shape of an upside-down pear. Inside the uterus is the uterine cavity (cavum uteri) with a flat, triangular interior. The upper two-thirds of the uterus is called the body of the uterus (corpus uteri) with the dome (fundus uteri) in the uppermost region, … Utero: dimensioni, posizione, struttura e funzione
