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Which plant material is not acted upon by any enzymes in the human alimentary canal?
Cellulose, found in plant walls, otherwise known as fibre
Are plant cell walls multilayered?
Yes - plant cell walls can have up to three layers. The middle lamella is the outermost layer and contains high levels of pectin. The primary cell wall is a thin, flexible layer found in the middle. The secondary cell wall is a thicker layer on the inside.
What is Peristalic waves?
are propulsions, which moves food through the alimentary canal, includes swallowing, which is initiated voluntarily, and peristalsis, an involuntary process.involves alternate waves of contraction and relaxation of muscles in the organ walls.
From the esophagus to the anal canalthe walls of every organ of the alimentary canal are made up of the same four basic layers arrange them in order from the lumen?
Mucosa, submucosa, muscularis externa, and serosa
Does fiber help food particles travel through the digestive system?
yes. fiber provide bulk to the food moving along the alimentary canal. It helps in peristalsis occurring in the walls of gut. I think its enough :)
What outermost covering of the animal cell?
membrane or plasma membrane.
Is a gizzards a kind of bird?
A gizzard is a part of a bird, not a type of bird. According to Merriam Webster, it's "the muscular enlargement of the alimentary canal of birds that has usually thick muscular walls and a tough horny lining for grinding the food and when the crop is present follows it and the proventriculus. "
What is the structer of an artery?
The walls of the arteries are genrally very thick. The innermost layer is made up of epithgelial cells. The middle layer consist mostley of muscle tissue. The outermost layer is made up of flexible connective tissue. The material allows it to withstand the force of the pumping blood. Got it from the TXT book =D
Where is the cell membrane located in cells that did not have cell walls?
Plant cells contain both a cell membrane and a cell wall. Animal cells contain only a cell membrane. For an animal cell, the cell membrane is the outermost layer of the cell.
how does paint stick on walls?
it has sticky layer in it
What layer consist of endothelium?
Capillary walls consists of a single layer of flat endothelium
What are the 4 layers of the gi tract?
The walls of the alementary canal, which is from the esophagus to the large intestine, comprise of 4 layers. The are: Mucosa, Submucosa, Muscularis Externa, and the serosa. The Mucosa is the innermost, while the serosa is the outermost. The Muscularis externa is the muscle layer, and typically made up of inner circular layer and outer longitudinal layer or smooth muscle cells. The submucosa is soft connective tissue containing blodd vessels, nerve endings from the intrinsic nerve plexus, and lymph nodules as well as lymph vessels.
