What are mandibles and maxillae?
What are mandibles and maxillae?
Mandibles – hard, powerful cutting jaws. Maxillae – ‘pincers’ which are less powerful than the mandibles. They are used to steady and manipulate the food. They have a five segmented palp which is sensory and often concerned with taste. Labium – the lower cover, often referred to as the lower lip.
What is maxillae in crustaceans?
In arthropods, the maxillae (singular maxilla) are paired structures present on the head as mouthparts in members of the clade Mandibulata, used for tasting and manipulating food. In crustaceans, the first pair are called maxillulae (singular maxillula).
What is maxillae in cockroach?
Maxillae are the paired mouth parts of cockroach located behind mandibles. The maxillae of cockroach consists of hardened plates called sclerites like lacinia that is modified for tearing food. The maxillae also bear sensory palps with hairs that help in tasting and smelling of food.
What is maxillae used for?
There are multiple functions of the maxilla. It provides critical bone structure to the skull and defines the face, for example. Since it houses the upper teeth and forms a portion of the jaw, the maxilla is necessary for the process of mastication (chewing) and speaking.
What are the Maxillae?
The maxilla is the bone that forms your upper jaw. The right and left halves of the maxilla are irregularly shaped bones that fuse together in the middle of the skull, below the nose, in an area known as the intermaxillary suture. The maxilla is a major bone of the face.
What are the mandibles?
The mandible is the largest bone in the human skull. It holds the lower teeth in place, it assists in mastication and forms the lower jawline. The mandible is composed of the body and the ramus and is located inferior to the maxilla. The body is a horizontally curved portion that creates the lower jawline.
What is the meaning of Maxillipeds?
maxilliped. (Science: zoology) One of the mouth appendages of crustacea, situated next behind the maxillae. Crabs have three pairs, but many of the lower Crustacea have but one pair of them. Synonym: jawfoot, and foot jaw.
What are the maxillae?
What are cockroach mandibles?
In cockroach, mandibles are a pair of short, triangular, hard, unjointed,chitinised structures present on either side of the mouth. The inner margins of mandibles have teeth like structures. Each mandible has two types of teeth. They are incising teeth and grinding teeth.
How do the maxillae function in relation to the mandibles?
Maxillae in most insects function partly like mandibles in feeding, but they are more mobile and less heavily sclerotised than mandibles, so they are more important in manipulating soft, liquid, or particulate food rather than cutting or crushing food such as material that requires the mandibles to cut or crush.
What are alveolar processes?
The alveolar process is the thick ridge of bone in the jaw that holds the dental alveoli, or tooth sockets. The dental alveoli hold the roots of the teeth in place, and in case of a dental implant, the alveolar process holds implant hardware in place.
What is a key landmark of the maxillae?
Maxillary Tuberosity. (Radiopaque) The extension of the alveolar bone behind the molars and marks the posterior limits of the maxillary arch. Nasal Septum. (Radiopaque) A vertical wall of bone dividing the nasal fossa, Which may be seen above the roots of the incisors.
What is the meaning of maxilliped?
Definition of maxilliped : any of the crustacean appendages that comprise the first pair or first three pairs situated next behind the maxillae First Known Use of maxilliped 1846, in the meaning defined above
What is the meaning of maxillae?
max·il·li·ped | \\ mak-ˈsi-lə-ˌped \\. : any of the crustacean appendages that comprise the first pair or first three pairs situated next behind the maxillae.
What are the parts of a maxilliped plate?
Basically consists of basal section (coxa, basis) bearing a five-segmented (ischium, merus, carpus, propodus, dactylus) palp. Basis and ischium typically with endites. Maxilliped pair variously fused, (with/without palp; maxilliped pair: with fused coxae, with fused coxae and endites, reduced to single unpaired plate).
What is the function of the second pair of maxillae?
The second pair of maxillae of euphausiids are often referred to as maxillipeds. They are thoracic in origin and there may be 1-3 pairs, depending on the type of crustacean. They handle the food. [ Mauchline, 1984]
