It's continuous above with the midbrain and below with the medulla oblongata. The pons (L. Pons = bridge) is the large middle part of the brainstem. It creates a broad bridge between the 2 cerebellar hemispheres by its transverse fibres making up the middle cerebellar peduncles, which is why it is given its [...]
Found along the posterior edges of the thyroid lobes inside the thyroid capsule, there are 2 pairs (superior and inferior) of small endocrine glands. They seem as small yellowish-brown bodies. The parathyroid glands secrete a hormone, which keeps blood calcium level by marshalling the calcium from the bones called parathormone. Its activity is opposite to [...]
The pia mater becomes the tela chorioidea when it is carried over the inferior part of the roof or posterior wall of the fourth ventricle of the brain, and the portion of the pia mater from which the chorioid plexuses of that cavity are created is attached to it. Tela Choroidea Structure, Attachment [...]
The external ear is composed of (a) pinna or auricle and (b) external auditory meatus that are concerned with collection and transmission of sound waves to the tympanic membrane, respectively. Auricle/Pinna The auricle is located on the side of the head and is trumpet-like undulating projection. With the exception of its lobule the [...]
Midbrain It includes the nuclei of the 3rd (oculomotor), 4th (trochlear) and 5th (trigeminal) cranial nerves. The midbrain is the smallest section of the brainstem and is situated just above the pons. It is traversed by the cerebral aqueduct. The part dorsal to the aqueduct is termed the tectum and is composed of [...]
The trachea is a membrano-cartilaginous tube creating the start of lower respiratory passage and is non-collapsible. The Trachea is also called windpipe and it is a fibrocartilaginious tube that creates the beginning of the lower respiratory tract. 16-20 C-shaped rings of Hyaline cartilage keep its lumen distinct. A band of smooth muscle (Trachealis) and a fibroelastic [...]
Salivary glands are glands that open or produce into the oral cavity. The majority of salivary glands open into the oral cavity outright or through small ducts and are small glands in the submucosa or mucosa of the oral epithelium lining the tongue, palate, cheeks, and lips. Besides these small glands are much larger glands, [...]
The middle ear is sandwiched between the external and internal ear. The middle ear (syn. tympanum, tympanic cavity) is a narrow slit-like air filled cavity inside the petrous part of the temporal bone. Via its medial wall 3 auditory ossicles carry sound vibrations from tympanic membrane in its lateral wall to the internal ear. From [...]
The stalklike part of the brain which connects the forebrain (diencephalon and cerebrum) with the spinal cord is called the brainstem. From below upward, it consists of the medulla oblongata, pons and midbrain. It is composed of nerve fibres and nerve cells. The nerve cells like spinal cord don't create one central mass of grey [...]
The nasopharynx is located behind the nasal cavities and above the soft palate. Borders Roof: It's created by: Body of sphenoid. Basilar part of the occipital bone. Floor: It's created by: Soft palate (sloping upper surface). Pharyngeal isthmus, an opening in the floor between the free edges of soft palate and posterior pharyngeal wall. Anterior [...]