Four features of the small intestine make it efficient at absorption of digested food:
1. The small intestine is LONG- this ensures food remains in the small intestine long enough for the products of digestion to be fully absorbed into the bloodstrem.
2. The Small intestine is HIGHLY FOLDED into villi (s. villus)- This gives a greater surface area for more efficient diffusion of products into the bloodstream.
3. The small intestine has a RICH BLOOD SUPPLY - Each villus has a network of capillaries so that the products of digestion are carried away from the small intestine efficiently.
4. The epithelium of the small intestine in the villi is only ONE CELL THICK - for easier diffusion of the products of digestion into the bloodstream. The walls of the capillaries are only one cell thick as well!!
microfilaments
microfilaments
(((((They can all form bonds between polymer chains that create parallel strands.)))))) They all form highly branched fibers. They all contain peptide bonds. They are all composed of glucose in either the or form.
Transmission electron microscopes have the capacity toproduce two-dimensional, black and white images.
The two main types of adaptations are structural (physiological) and behavioural.Structural adaptations include features such as bipedalism, jaw and tooth structure, opposable thumbs, position of the eyes and ears, electroreception, webbed feet, beak size and shape for birds, etc.Behavioural adaptations include behaviour such as being nocturnal or diurnal, herding, hunting in groups, to name a few.
The absorptive surface area of the small intestine is actually about 250 square meters (almost 2,700 square feet) – the size of a tennis court! How is this possible? The small intestine has three features which allow it to have such a huge absorptive surface area packed into a relatively small space:1. Mucosal folds: The inner surface of the small intestine is not flat, but thrown into circular folds. This not only increases the surface area, but helps regulate the flow of digested food through your intestine.2. Villi: The folds form numerous tiny projections which stick out into the open space inside your small intestine (or lumen), and are covered with cells that help absorb nutrients from the food that passes through.3. Microvilli: The cells on the villi are packed full of tiny hair like structures called microvilli. This helps increase the surface of each individual cell, meaning that each cell can absorb more nutrients.
They are small and do nothing
A Chimpanzee's structural features are quite similar to that of humans. They can walk bipedally, have opposable thumbs and have the same internal anatomy as humans do.
prokaryotic
microfilaments
to keep your acid
microtubules
axon, cell body,dendrites
When referring to a text, the term "structural features" refers to the manner in which the literary elements of the text are assembled.
The absorptive surface area of the small intestine is actually about 250 square meters (almost 2,700 square feet) - the size of a tennis court! There are two structures that allow absorbsion: 1) villi which are folds and 2) microvilli, tiny finger like projections on each villi.
they are all earth worms and can be disected without dying.
Antannule