B3

B3 - Organisation and the Digestive system

B3.1 - Tissues and Organs 

a tissue is a group of cells with a similar structure and function.

organs are a collection of tissues performing functions

organs are organised into organ systems, which perform to form organisms.

B3.2 - The Human Digestive System

organs systems are a collection of organs performing functions in the body.

the digestive system in a mammal is an organ system in which several organs work together to break down and digest food.

B3.3 - The Chemistry of Food

Carbohydrates are made from units of sugars

simple sugars are carbohydrates. you can test for sugars using benedict's solution, which (from blue) turns brick red

you can test for starch using the yellow iodine solution. if starch is present it turns blue black.

to test for lipids, use ethanol, which becomes cloudy when is present.

to test for protein you can use buiret's reagant…