GAS EXCHANGE IN INSECTS Insects have a tracheal

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GAS EXCHANGE IN INSECTS

GAS EXCHANGE IN INSECTS

 Insects have a tracheal system for gas exchange GAS EXCHANGE IN INSECTS

Insects have a tracheal system for gas exchange GAS EXCHANGE IN INSECTS

 Insects have a tracheal system for gas exchange Spiracles (similar to valves) can

Insects have a tracheal system for gas exchange Spiracles (similar to valves) can be closed to conserve water and open along each side of the abdomen for obtaining oxygen. GAS EXCHANGE IN INSECTS

 Insects have a tracheal system for gas exchange Spiracles (similar to valves) can

Insects have a tracheal system for gas exchange Spiracles (similar to valves) can be closed to conserve water and open along each side of the abdomen for obtaining oxygen. Trachea (with rings of chitin to hold them open) start at the spiracles and branch out as they go into the body. GAS EXCHANGE IN INSECTS

 Insects have a tracheal system for gas exchange Spiracles (similar to valves) can

Insects have a tracheal system for gas exchange Spiracles (similar to valves) can be closed to conserve water and open along each side of the abdomen for obtaining oxygen. Trachea (with rings of chitin to hold them open) start at the spiracles and branch out as they go into the body. The very fine branches, tracheoles, don’t have chitin and pass between the body cells. GAS EXCHANGE IN INSECTS

 Insects have a tracheal system for gas exchange Spiracles (similar to valves) can

Insects have a tracheal system for gas exchange Spiracles (similar to valves) can be closed to conserve water and open along each side of the abdomen for obtaining oxygen. Trachea (with rings of chitin to hold them open) start at the spiracles and branch out as they go into the body. The very fine branches, tracheoles, don’t have chitin and pass between the body cells. Oxygen diffuses into the cells, and carbon dioxide diffuses out. GAS EXCHANGE IN INSECTS

 Air sacs may also be there to increase efficiency of the trachea. GAS

Air sacs may also be there to increase efficiency of the trachea. GAS EXCHANGE IN INSECTS

 Air sacs may also be there to increase efficiency of the trachea. The

Air sacs may also be there to increase efficiency of the trachea. The insect can pump it’s body to aide the movement of the gases into and out of the body. GAS EXCHANGE IN INSECTS

 Air sacs may also be there to increase efficiency of the trachea. The

Air sacs may also be there to increase efficiency of the trachea. The insect can pump it’s body to aide the movement of the gases into and out of the body. Insects have an open transport system – blood moves slowly and gas transport is also slow. GAS EXCHANGE IN INSECTS

 Air sacs may also be there to increase efficiency of the trachea. The

Air sacs may also be there to increase efficiency of the trachea. The insect can pump it’s body to aide the movement of the gases into and out of the body. Insects have an open transport system – blood moves slowly and gas transport is also slow. The tracheal system = rapid transport of gases needed for high metabolic rate for active insects (flying). GAS EXCHANGE IN INSECTS

 Air sacs may also be there to increase efficiency of the trachea. The

Air sacs may also be there to increase efficiency of the trachea. The insect can pump it’s body to aide the movement of the gases into and out of the body. Insects have an open transport system – blood moves slowly and gas transport is also slow. The tracheal system = rapid transport of gases needed for high metabolic rate for active insects (flying). The tracheal system as well as the exoskeleton limits insect size. GAS EXCHANGE IN INSECTS