The omohyoid muscle is a muscle in the neck. It is one of the infrahyoid muscles. It consists of two bellies separated by an intermediate tendon. Its inferior belly is attached to the scapula; its superior belly is attached to the hyoid bone. Its intermediate tendon is anchored to the clavicle and first rib by a fascial sling. The omohyoid is innervated by the ansa cervicalis of the cervical plexus. It acts to depress the hyoid bone.
Superficial muscular aponeurotic system (SMAS) is a thin yet tough unitary tissue plane of the face formed by facial fasciae, subcutis connective tissue, and facial muscles. Its composition varies, containing muscle fibres in some areas, and fibrous or fibroaponeurotic tissue in others. It connects to the dermis via vertical septa. It does not attach to bone. In most areas, a distinct plane can be defined deep to the SMAS.
The lateral cricoarytenoid is an intrinsic muscle of the larynx. It attaches at the cricoid cartilage anteriorly, and at the arytenoid cartilage of the same side posteriorly. It is innervated by the recurrent laryngeal nerve. It acts to close the rima glottidis, thus closing the airway.
The zygomaticotemporal nerve (zygomaticotemporal branch, temporal branch) is a cutaneous (sensory) nerve of the head. It is a branch of the zygomatic nerve (itself a branch of the maxillary nerve (CN V2)). It arises in the orbit and exits the orbit through the zygomaticotemporal foramen in the zygomatic bone to enter the temporal fossa. It is distributed to the skin of the side of the forehead. It also contains a parasympathetic secretomotor component for the lacrimal gland which it confers to the lacrimal nerve (which then delivers it to the gland).
The posterior ethmoidal artery is an artery of the head which arises from the ophthalmic artery to supply the posterior ethmoidal air cells, and the meninges. It is smaller than the anterior ethmoidal artery.
The tunica vaginalis is a pouch of serous membrane within the scrotum that lines the testis and epididymis, and the inner surface of the scrotum. It is the outermost of the three layers that constitute the capsule of the testis, with the Tunica albuginea of testis situated beneath it.
The dorsal nasal artery is an artery of the face. It is one of the two terminal branches of the ophthalmic artery. It contributes arterial supply to the lacrimal sac, and outer surface of the nose.
The short posterior ciliary arteries are a number of branches of the ophthalmic artery. They pass forward with the optic nerve to reach the eyeball, piercing the sclera around the entry of the optic nerve into the eyeball.
The tunica vasculosa testis is the inner-most of the three layers that form the capsule of the testis. It consists of a vascular plexus and loose connective tissue. It extends into the testis itself to line the surfaces of individual septa of testis.
The patellar plexus is a nerve plexus within the subcutaneous tissue overlying and surrounding the patella and ligamentum patellae. It is a fine network of communicating nerve fibres.
The artery to the ductus deferens is an artery in males that provides blood to the ductus deferens.
The mediastinum testis is a thick yet incomplete septum at the posterior part of the testis formed by the tunica albuginea of testis projecting into the testis at its posterior aspect where the testis is not lined by the serous membrane to allow for the attachment of the epididymis. It extends posteriorly between the testis' superior pole and inferior pole. It is wider superiorly than inferiorly. It supports the rete testis and blood and lymphatic vessels of the testis in their passage into and out of the substance of the gland.
The renal fascia is a dense, elastic connective tissue envelope enclosing the kidney and adrenal gland, together with the layer of perirenal fat surrounding these two.
The ethmoidal infundibulum is a funnel-shaped/slit-like/curved opening/passage/space/cleft upon the anterosuperior portion of the middle nasal meatus at the hiatus semilunaris. The anterior ethmoidal air cells, and (usually) the frontonasal duct open into the ethmoidal infundibulum. The ethmoidal infundibulum extends anterosuperiorly from its opening into the nasal cavity.
The prevertebral fascia is the layer of deep cervical fascia that surrounds the vertebral column. It is the deepest layer of deep cervical fascia.
The cricotracheal ligament connects the cricoid cartilage superiorly, and the first tracheal cartilage ring inferiorly. It is continuous with the tracheal perichondrium and resembles the fibrous membrane which connects the cartilaginous rings of the trachea to each other.
The pharyngobasilar fascia is a fascia of the pharynx. It is situated between the mucous and muscular layers of the pharynx. It is formed as a thickening of the pharyngeal mucosa superior to the superior pharyngeal constrictor muscle. It attaches to the basilar part of occipital bone, the petrous part of the temporal bone, the medial pterygoid plate, and the pterygomandibular raphe. It diminishes in thickness inferiorly. Posteriorly, it is reinforced by the pharyngeal raphe. It reinforces the pharyngeal wall where muscle is deficient.
A superior costotransverse ligament is a ligament of the costotransverse joint that attaches onto the crest of the neck of a rib, and onto the transverse process of the vertebra superior to the rib.
The parotid fascia is a tough fascia enclosing the parotid gland. It has a superficial layer and a deep layer.
The conjoint longitudinal muscle is a muscle layer in the wall of the anal canal between the internal anal sphincter and external anal sphincter. It is continuous proximally with the longitudinal (outer) smooth muscle layer of the rectum. It receives autonomic innervation in common with the internal anal sphincter.
