7.4 Ventilation And Gas Exchange In Other Organisms Flashcards

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1
Q

Spiracle

A

Small openings on thorax and abdomen of insect

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2
Q

Chitin

A

Fibrous substance made of polysaccharides

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3
Q

Tracheole

A

Minute tubes with no chitin, freely permeable to gas. Greatly elongated cell

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4
Q

Tracheal fluid

A

At end of tracheole. Limits penetrative of air for diffusion.

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5
Q

Mechanical ventilation of the tracheal system

A

Air actively pumped into system by muscular pumping movements of abdomen/thorax. Changes tracheal pressure.

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6
Q

Gill

A

Organ allowing gaseous exchange in fish. Contained in a Gill cavity and covered by an operculum in bony fish

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7
Q

Operculum

A

Bony flap protecting gills from damage. Also assisting in maintaining flow of water of gills

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8
Q

Gill filament

A

Part of the Gill that has lamellae which water flows over. Lamellae purpose is to increase SA:V

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9
Q

Ram ventilation

A

Method of ventilation allowing water to constantly be passed over gills simply by not stopping moving

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10
Q

Buccal cavity

A

Area in fish’ mouth allowing water to enter then being pushed through gills. Opposing ram ventilation

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11
Q

Overlapping Gill filament tips

A

Increases resistance to flow of water. More time for gaseous exchange

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12
Q

Countercurrent exchange system

A

Flow of water and blood face
opposite directions greatly increasing intake of oxygen from the water. Increases steep concentration gradients

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