Open to the entry from Tuesday: How do Animals Use Food to Grow

SUMMARIZE WHAT HAPPENED TO THE MOLECULES THAT ENTERED THE MOUTH OVER THE TIME PERIOD BETWEEN TIME 0 AND TIME 4. THE MOLECULES WERE BROKEN INTO SUBUNITS IN THE STOMACH, and small intestine -SENT TO CELLS BY WAY OF THE BLOOD AND WERE REBUILT INSIDE THE CELLS

Agenda: Digestion and Growth Setup Mealworm Experiment LogBook Check Friday Food Molecules CheckUP- part2

Block Day-10/20 Make a new entry- Digestion and Growth - Glue in the diagram of the digestive system

Read the Digestive System article List the five titles- ingestion, digestion, circulation, reassembly/growth/storage-write a summary of each paragraph (Leave space to add info)

Some new words and ideas… Ingestion: the process by which food is taken from the outside of the body and placed into the mouth. Begins the breakdown of carbohydrates only. Amylase- an enzyme in saliva Which time step in the activity best represents ingestion? Time 0

Cells throughout the body. Time 0 Cells throughout the body. In the mouth. Fat cell Muscle cell Typical body cell Bloodstream Inside stomach and small intestine. Molecules pass through walls of small intestine into blood stream and are carried to cells throughout the body. Inside large intestine. Waste that leaves the body.

…food passes from the mouth to the stomach and small intestine… Digestion: the breakdown of food molecules into sub-units. What sub-units is starch broken down into? What sub-units are fats broken down into? What sub-units are proteins broken down into? Which time step in the activity best represents digestion? glucose fatty acids and glycerol amino acids Time 1

Cells throughout the body. Time 1 Cells throughout the body. In the mouth. Fat cell Muscle cell Typical body cell Bloodstream Inside stomach and small intestine. Molecules pass through walls of small intestine into blood stream and are carried to cells throughout the body. Inside large intestine. Waste that leaves the body.

Cellulose Material in plant cell walls. Cannot be digested by most animals. Is not used by the body for food. 50% of feces = cellulose and other indigestible food products. 50% of feces = dead bacteria which once lived in the digestive tract.

…however… Some microorganisms can ‘digest’ cellulose. What sub-units would cellulose break down to? glucose

Small Intestine Video

…molecules then pass from the small intestine into the blood stream… Circulation: molecules are carried to all cells of the body by the blood stream.

Cells throughout the body. Time 2 Cells throughout the body. In the mouth. Fat cell Muscle cell Typical body cell Bloodstream Blood Inside stomach and small intestine. Molecules pass through walls of small intestine into blood stream and are carried to cells throughout the body. Inside large intestine. Waste that leaves the body.

The digestion process that happens in the stomach and small intestine helps make food molecules small enough to pass from the digestive tract into the blood and then into the cells.

Reassembly Once the sub-units of molecules get into our cells, they are reassembled into larger molecules. Newly constructed molecules are used for structure (Growth)and storage

Cells throughout the body. Time 3 Cells throughout the body. In the mouth. Fat cell Muscle cell Typical body cell Bloodstream Inside stomach and small intestine. Molecules pass through walls of small intestine into blood stream and are carried to cells throughout the body. Inside large intestine. Waste that leaves the body.

Cells throughout the body. Time 4 Cells throughout the body. In the mouth. Fat cell Muscle cell Typical body cell Bloodstream Inside stomach and small intestine. Molecules pass through walls of small intestine into blood stream and are carried to cells throughout the body. Inside large intestine. Waste that leaves the body.

Growth and Storage Plants make long chains of carbohydrate sub-units. Used for structure and growth of an organism. Serve as storage for later use. Example – from glucose, plants can make cellulose for cell walls or starch for storage.

Glycogen Animals are mostly made of proteins (not carbohydrates) But animals still need to store carbohydrates. Instead of starch, animals store sugar in long chains of glucose called glycogen. Glycogen is stored in the liver and muscles for future use.

Mealworm Experiment Setup

MAKE A NEW ENTRY TITLED SUMMARY QUESTIONS