Describe the types of teeth and their functions. Identify the structure from the given description: Passes swallowed food to the stomach. What structure of the eye modifies the shape of the lens? (a) Define salivary glands. (b) What is its function?
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are brought about by themusclesof mastication (the masseter, thetemporal, the medial and lateral pterygoids, and the buccinator). The sensitivity of theperiodontal membranethat surrounds and supports the teeth, rather than the power of the muscles of mastication, determines the force of the bite....
Describe the function of the digestive system, and differentiate between organs of the alimentary canal and the accessory organs or structures. Describe the structure and functions of the large intestine and identify its specialized ...
Cells also vary in shape, and typically their shapes are closely related to their functions. For instance(例如), nerve cells often have long, threadlike extensions that transmit nerve impulse from one part of the body to another. Epithelial cells that line the inside of the mouth are thin, ...
Jangoux, Fine structure and presumed functions of the pedicellariae of Echinocardium cordatum (Echinoder- mata, Echinoidea), Zoomorphology 106 (1987) 279-288.Ghyoot, M. , C. de Ridder , and M. Jangoux ( 1987 ) Fine structure and presumed functions of the pedicellariae of Echinocardium ...
Headward, the alimentary tube extends up in front of the notochord and projects above the upper part of the body wall (tongue) and in front of and below the brain to join the epidermal depression. From the epidermal depression are formed theteethand most of the mouth lining; from the uppe...
Tooth development is traced in dentitions from 169 embryonic Lamna nasus (96–670 mm fork length [FL]), and 8 juvenile to adult L. nasus (67–300 cm FL). The teeth of these dentitions vary significantly in the attitudes and shapes of their crowns, and the forms of their roots. At ...
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passes through them; raw sound emerges from the larynx and passes to the upper cavities, which act as resonating chambers (or in some languages, such as Arabic, as shapers of sound), and then passes through the mouth for articulation by the tongue, teeth, hard and soft palates, and lips...