describe the flow of blood through different parts of the elementary canal in men
Answers
Answer:
Human digestive system which is also known as the alimentary canal is a muscular tube which extends from the mouth to the anus. The parts of the human digestive system include – mouth, oral cavity, teeth, oesophagus, pharynx, stomach, small intestine, large intestine, and anus.
Mouth
The mouth is the opening through which the intake of food occurs.
Oral cavity
The oral cavity has three parts –the palate, tongue, and teeth.
Palate
It forms the roof of the oral cavity. The anterior part is called hard palate and the posterior part is called the soft palate.
Tongue
The tongue is a muscular and glandular structure attached to the base of the oral cavity. On the upper surface, it has a V-shaped furrow called sulcus terminalis. It divides the tongue into the anterior oral part and posterior pharyngeal part. Its upper surface also consists of tiny projections called lingual papillae. Lingual papillae are of three kinds in humans-
(i) Vallate or circumvallate papillae -have gustatory receptors to sense taste
(ii) Filiform papillae- smallest and contain touch receptors.
(iii) Fungi-form papillae- Rounded and mostly present at the tip of the tongue.
Also Read: Structure of Tongue
Teeth
Humans are diphyodont i.e. they have two sets of teeth- milk or deciduous and permanent teeth. Here is the list of different types of teeth in humans with their functions.
