How many teeth in humans grow twice in a lifetime?

...... teeth are absent in rabbits.

Which layer of cells secretes the enamel of the teeth?

In human beings, the $ \text{stomach} $ of the digestive system gives the feeling of satiety.

What is the correct sequence of the parts of the small intestine?

Select the correct statement$(s)$:
$(A)$ The alimentary canal begins with an anterior opening,the mouth.
$(B)$ Each tooth is embedded in a socket of jaw bone.
$(C)$ Humans exhibit a diphyodont type of dentition.
$(D)$ The oesophagus and the trachea open into the larynx.