It is the part of the digestive tract where approx 90% of the digestion and absorption of food occurs, the other 10% taking place in the stomach and large intestine. The main function of the small intestine is absorption of nutrients and minerals.That is, absorption of the nutrients and minerals in the food ingested, usually via the mouth, at an earlier stage in the digestive process.t is the part of the digestive tract where approx 90% of the digestion and absorption of food occurs, the other 10% taking place in the stomach and large intestine. The main function of the small intestine is absorption of nutrients and minerals.
Green seaweeds. Characteristics: Green colour from chlorophyll a and b in the same proportions as the 'higher' plants; beta-carotene (a yellow pigment); and various characteristic xanthophylls (yellowish or brownish pigments). Food reserves are starch, some fats or oils like higher plants.
Seaweed vs Algae. These are two interesting groups of organisms, or âplantsâ inhabiting aquatic ecosystems. Seaweeds include into a portion of algae, and that describes the relationship between these two.However, there are both similarities and differences between seaweeds and algae despite their inconsistency in classification, especially seaweeds.here are three types of seaweeds known as red, brown, and green with more than 10,000 species. Red algae is the group with the highest diversity containing over 6,000 species, and green has the least diversity with about 1,200 species.