The crown of the teeth is covered by:

The central axis of each hepatic lobule is formed by:

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

In humans,the ...... is a blind sac which hosts some symbiotic microorganisms.

Peyer's patches produce . . . . . . .

Given below are two statements.
Statement $I$: Since human beings have different kinds of teeth fitted in two jaws,the dentition is described as diphyodont.
Statement $II$: Human beings have four different kinds of teeth,hence it is described as heterodont.