When the penis is aroused, the bulbourethral glands produce amucussecretion that adds lubricating factors to the ejaculate. Theyre also known as Cowpers glands. Anatomy Location The bulbourethral glands lie below theprostate glandin the deep perineal pouch. Theyre made up of a data pipe of small ducts (tubes) and sac-like structures called alveoli. Ducts from the bulbourethral glands empty into the urethra. What Is the Urethra? Theurethrais a duct that carries urine from the bladder to where its expelled from the body....

Injury to a bursa may cause pain, limited motion, and decreasedfunctional mobility. Fun fact: The plural of bursa is bursae. Anatomy The bursae in your body are made up of asynovial membrane. PeopleImages / Getty Images This thin membrane of tissue secretes the synovial fluid that is contained within the bursa sac. Bursae are very small and thin. An injury to your bursa may cause it to fill with blood or white blood cells....

Most of the time, blood will flow through the circle of Willis without interruption. Anatomy of the Circle of Willis The circle of Willis is made of up arteries. Arteries are the blood vessels that transport oxygenated blood from the heart to tissues throughout the body. Phil Boorman / Getty Images The circle of Willis is a relatively small, symmetrical structure with a circumference of just a few centimeters. Each blood vessel in the circle has a diameter of between 1....

Before fusion occurs, the coccygeal vertebra articulate just like any other section of the spinal column. The coccyx can be a source of pain in many people. There are usually four coccygeal vertebrae that attach to the apex (small, bottom part) of thesacrum. Illustration by Alexandra Gordon, Verywell Most of the time, they are referred to as Co1-Co4. Viewed as a single bone, the coccyx resembles a bull’s head. It has two “horns” on top (the base) that are called the coccygeal cornua....

The cochlea is a fluid-filled, snail-like structure within a cavity in the inner ear. This article will describe the structure and function of the cochlea. Anatomy The spiral shape of the cochlea is necessary for the transduction of different sound frequencies. JACOPIN /BSIP / Getty Images The cochlea is approximately 10 millimeters (mm) wide. If it were uncoiled, the cochlea would be approximately 35 mm long. The cochlear duct is another bony, hollow tube that sits between the scala vestibuli and the scala tympani....

The cranium has bones that protect the face and brain The cranium is part of the skull anatomy. The entire skull is made up of 22 bones, eight of which are cranial bones. The two main parts of the cranium are the cranial roof and the cranial base. Thorsten Nilson / EyeEm / Getty Images Together, the cranial and facial bones make up the complete skull. The cranium has a very important job: to hold and protect the brain....

It is divided into four main structuresthe thalamus,hypothalamus, epithalamus, and subthalamus. Structures that make up the diencephalon are also involved in regulating body temperature, appetite, and more. Dysfunction of any of these crucial parts of the human brain can result in serious health conditions. PALMIHELP / iStock / Getty Images It is part of the third ventricle of the brain. Along with the cerebrum, the diencephalon is part of the forebrain....

The esophagus is an organ that connects the back of the throat (or pharynx) with the stomach. Its primary function is to deliver nutrition and liquid to the stomach. How long is the esophagus? Ericsphotography/Getty Images The three parts of the esophagus are the cervical, thoracic, and abdominal segments. Anatomical Variations Generally speaking, variations to the esophaguss anatomy are extremely rare. Disorders and diseases here can arise independently or be part of an underlying condition....

The motions of these muscles assist the lungs by raising the ribs and expanding the chest cavity. Anatomy There are two sets of intercostal muscles within the rib cage. Internal intercostals can be found in the layer of muscles directly below the external intercostals. Internal intercostals assist with exhalation and moving the ribs and chest cavity back to their original position. These muscles combine to fill in the space between each rib and provide support for the respiratory system....

They are important parts of the female reproductive system. Fertilization normally happens in the fallopian tubes. Their shape is similar to an extended J. Kinwun / Getty Images The open ends of the fallopian tubes lie very near the ovaries but they are not directly attached. They are instead connected by a piece of tissue called the mesosalpinx. They are generally considered to consist of four sections: The fallopian tubes are made up of several layers....

It bears very little body weight. It is the thinnest of all the long bones compared to its length. Stress fractures of the fibulacan occur with repetitive stress impact exercises like running. Grafts can be removed from the fibula and replaced with implants to maintain the stability of the shaft. The fibula is a long bone, meaning that it is longer than it is wide. Running the length of the shaft in the center of the fibula is a cavity filled withyellow bone marrow....

It controls thinking skills, reasoning, self-control, and motor function. A person has left and right frontal lobes. This area of the brain grows rapidly during early childhood. Illustration by Julie Bang for Verywell Health It continues to physically grow and improve skills throughout childhood and adolescence. Frontal lobe functions continue to be refined throughout adulthood. Male and Female Brains Some evidence suggests differences in the development of male and female brains....

The gastrocnemius joins the soleus to form theAchilles tendon, the large tendon that attaches to your heel bone. You have two gastrocs, one in each lower leg. Anatomy The gastrocnemius muscle originates as two heads behind your knee. gilaxia / Getty Images The lateral head on the outside part of your lower leg arises from the lateral condyle of your femur. The muscle then courses down the back of your leg and joins the deeper soleus muscle....