What are capillaries? Alongside veins and arteries, capillaries are the third type of blood vessel in the circulatory system. They make up only around five percent of all blood vessels in the body (veins: 75 percent, arteries: 20 percent). The wafer-thin vessels form a finely branched, closed capillary network (rete capillare) over a total length … Capillaries: Structure and Function
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 … Hormone Glands: Structure and Function
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 … Hair: Structure, Function, Diseases
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 … Spine: Structure and function
What is the ear? The human ear is an organ that combines two functions: the sense of hearing and the sense of balance. The ear anatomy The ear is divided into three anatomical regions: The outer ear. This includes the pinna (auricle auris), the external auditory canal (meatus acusticus externus) and the eardrum (membrana tympani). … The human ear: Structure and function
What is the small intestine? The small intestine begins at the pylorus and ends at the Bauhin’s valve, the transition to the large intestine. Its total length is around five to six meters. Sections of the small intestine from top to bottom are Duodenum (duodenum), jejunum (jejunum) and ileum (ileum). Duodenum (duodenum) The duodenum begins … Small Intestine: Function and Structure
What is the cervical spine? The cervical spine (human) consists of seven cervical vertebrae (cervical vertebrae, C1-C7), which are positioned between the head and the thoracic spine. Like the lumbar spine, it has a physiological forward curvature (lordosis). Upper and lower cervical joint The first cervical vertebra is called the atlas, the second is the … Cervical Spine: Structure and Function
What is the penis? The penis and scrotum together form the male external genitalia. The penis structure includes three sections: penis root, penis shaft and glans. Penis root Via the penile root (radix), the member is attached to the pelvic floor and the lower pubic branches. It consists of three parts in the area of … Penis: Structure, Function, Diseases
What is the coccyx? The coccyx (Os coccygis) is the last section of the spine. It consists of four to five vertebrae, which in adults are usually fused into a single bone that is bent slightly forward. Movements in the coccyx are possible only forward and backward. Some of the individual coccygeal vertebrae are only … Coccyx – Structure and Function
What is memory? Memory can be thought of as either a process or a structure that helps people store information and retrieve it later. Memory is divided into several different categories based on the amount of time it takes to retrieve memory content. Ultra-short-term memory Newly arriving information quickly displaces the current content in the … Memory: Function and Structure
Aortic valve: pocket valve in the left heart The aortic valve acts as a valve between the left ventricle and the aorta. In terms of construction, it is a so-called pocket valve: it consists of three crescent-shaped “pockets”, the shape of which is reminiscent of a swallow’s nest. Due to their position and shape, they … Aortic valve – Structure and function
What is the urinary bladder? The urinary bladder, colloquially called “bladder” for short, is an expandable hollow organ in which the body temporarily stores urine. It is emptied voluntarily from time to time (micturition). The maximum capacity of the human bladder is 900 to 1,500 milliliters. As it fills, the bladder enlarges, which is possible … Bladder: Structure, Function, Capacity
