Digestive System Diagram Human Digestive System The human digestive system includes the following: Glands - the salivary glands, and glands in the pancreas that produce digestive juices The stomach...
Methods of Absorption Digestion breaks down food into smaller, soluble molecules These products of digestion then pass from the lumen of the intestine into the blood They pass through the microvill...
Villi: Increasing the Surface Area The ileum (the second section of the small intestine) is adapted for absorption It is very long It has a highly folded surface It has millions of villi (singular...
Introduction to Digestion The digestive system is an example of an organ system in which several organs work together to digest and absorb food Digestion is a process in which relatively large, ins...
Dichotomous Keys For anyone who doesn't specialise in studying a particular group of organisms, it can be very difficult to identify, or ID, a species when working in the field Correctly identifyin...
Cladistics & Reclassification The development of DNA sequencing technology means that classification can now be carried out on the basis of evolutionary relationship Organisms classified in thi...
Clades The term clade can be defined as A group of organisms that have all descended from a common ancestor Cladistics is the branch of science in which scientists put organisms into clades It invo...
Animal Phyla Features Animals are multicellular, eukaryotic organisms They are heterotrophs and most have a nervous system that enables responses to the surrounding environment There are over 30 an...
Plant Phyla Features All plants belong to the plant kingdom Within the plant kingdom are several phyla (singular phylum) Some plant phyla are small E.g. the Glaucophytes contain only 70 species and...
