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The digastric muscle (also digastricus) (named digastric as it has two 'bellies') is a bilaterally paired suprahyoid muscle located under the jaw.Its posterior belly is attached to the mastoid notch of temporal bone, and its anterior belly is attached to the digastric fossa of mandible; the two bellies are united by an intermediate tendon which is held in a loop that attaches to the hyoid bone.
The four classical muscles of mastication elevate the mandible (closing the jaw) and move it forward/backward and laterally, facilitating biting and chewing. Other muscles are responsible for opening the jaw, namely the geniohyoid, mylohyoid, and digastric muscles (the lateral pterygoid may play a role).
The posterior part of this triangle contains the external carotid artery, ascending deeply in the substance of the parotid gland. This vessel lies here in front of, and superficial to, the external carotid, being crossed by the facial nerve, and gives off in its course the posterior auricular, superficial temporal, and internal maxillary branches: more deeply are the internal carotid, the ...
Below the mental spine is an oval depression (the digastric fossa of the mandible) where the digastric muscle attaches. [7] Extending backward and upward on either side from the lower symphysis is a ridge called the mylohyoid line , where the mylohyoid muscle attaches; a small part of the superior pharyngeal constrictor muscle attaches to the ...
The digastric branch of facial nerve provides motor innervation to the posterior belly of the digastric muscle. [1] [2] It branches from the facial nerve (CN VII) near to the stylomastoid foramen [1] as the CN VII exits the facial canal (it thus branches proximal to the parotid plexus of facial nerve). [2]
Meaning: "good", "well"; also extended via Neo-Latin to mean "true". Used in a variety of ways, often to indicate well-preserved specimens, well-developed bones, "truer" examples of fossil forms, or simply admiration on the part of the discoverer.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
A monogastric organism has a simple single-chambered stomach (one stomach). Examples of monogastric omnivores include humans, pigs, hamsters and rats.Furthermore, there are monogastric carnivores such as cats. [1]