The function of the mouth in the human digestive system
The mouth is the first organ in the digestive system, and it is a cavity in which the teeth and the tongue exist, and the salivary glands are opened, The function of the mouth...
The mouth is the first organ in the digestive system, and it is a cavity in which the teeth and the tongue exist, and the salivary glands are opened, The function of the mouth...
The body of the living organism consists of a group of systems, Each system consists of a group of organs, Each organ consists of a group of tissues, Each tissue consists of a group...