Question

Select the incorrect statements.
(a) The alimentary canal begins with an anterior cavity called the buccal cavity.
(b) The tooth is embedded in a socket of mandible bone only.
(c) Human shows the strict diphyodont type of dentition.
(d) Oesophagus and the trachea open into the pharynx.

• A. a, b, c & d
• B. a, b & c
• C. b, c & d
• D. a, b & d

Answer 1

The correct option is C b, c & d

1: Alimentary canal is also called as digestive tract. It starts in the mouth followed by buccal cavity and ends at the anus. The digestion starts in the anterior cavity called buccal cavity.

2: Teeth are embedded in a socket of mandible (lower jaw) and maxilla (upper jaw). These sockets are called as tooth sockets.

3: Human shows both diphyodont and monophyodont types of dentition. In diphyodont dentition, there are 2 sets of teeth, namely deciduous and permanent set. In monophyodont dentition, there is only 1 set of teeth. In humans, molar teeth show monophyodont dentition and rest teeth show diphyodont dentition.

4: Pharynx is part of both digestive and respiratory system. Pharynx opens into oesophagus in digestive system and larynx in respiratory system.