Download GIF - Mouth Download HD
In animal anatomy, the mouth, also known as the oral cavity, buccal cavity, or in Latin cavum oris, is the opening through which many animals take in food and issue vocal sounds. It is also the cavity lying at the upper end of the alimentary canal, bounded on the outside by the lips and inside by the pharynx and containing in higher vertebrates the tongue and teeth. This cavity is also known as the buccal cavity, from the Latin bucca ('cheek'). Some animal phyla, including vertebrates, have a complete digestive system, with a mouth at one end and an anus at the other. Which end forms first in ontogeny is a criterion used to classify animals into protostomes and deuterostomes. Development In the first multicellular animals, there was probably no mouth or gut and food particles were engulfed by the cells on the exterior surface by a process known as endocytosis. The particles became enclosed in vacuoles into which enzymes were secreted and digestion took place intracellularly. The digestive products were absorbed into the cytoplasm and diffused into other cells. This form of digestion is used nowadays by simple organisms such as Amoeba and Paramecium and also by sponges which, despite their large size, have no mouth or gut and capture their food by endocytosis. The vast majority of other multicellular organisms have a mouth and a gut, the lining of which is continuous with the epithelial cells on the surface of the body. A few animals which live parasitically originally had guts but have secondarily lost these structures. The original gut of multicellular organisms probably consisted of a simple sac with a single opening, the mouth.
This GIF Bitmap Image Mouth Download HD is a part of Mouths Category in Medical Folder. Mouth Download HD has a Resolution of 108x69 Pixels. Mouth Download HD is of .gif (Graphics Interchange Format) Format. It's Size is 8.9KB. This GIF has been Downloaded 100 times till now. Mouth Download HD was Added on 15-10-2022. Download Mouth Download HD by clicking the button below:
Image Name: Mouth Download HD
Image Category: Medical / Mouths
Date Added: 15-10-2022
Resolution: 108x69
Format: GIF
Downloads: 100
Views: 163
Size: 8.9KB