insect structure and function
DESCRIPTION
INSECT STRUCTURE AND FUNCTION. INSECT CIRCULATORY SYSTEM. IN MULTICELLULAR ORGANISMS THE UNIFORM DISTRIBUTION OF METABOLIC MATERIALS BECOMES A PROBLEM. SIZE MATTERS. HEMOCOEL. - PowerPoint PPT PresentationTRANSCRIPT
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INSECT STRUCTURE AND
FUNCTION
INSECT STRUCTURE AND
FUNCTION
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IN MULTICELLULAR ORGANISMS THE
UNIFORM DISTRIBUTION OF
METABOLIC MATERIALS BECOMES
A PROBLEM.
IN MULTICELLULAR ORGANISMS THE
UNIFORM DISTRIBUTION OF
METABOLIC MATERIALS BECOMES
A PROBLEM.
HEMOCOEL
INSECT CIRCULATORY SYSTEMINSECT CIRCULATORY SYSTEM
SIZE MATTERS
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IN INSECTS, CIRCULATION IN THE FLUID-FILLED BODY CAVITY (HEMOCOEL) IS SUPPLEMENTED BY A LONGITUDINAL
DORSAL VESSEL (MESODERMAL ORIGIN).
IN INSECTS, CIRCULATION IN THE FLUID-FILLED BODY CAVITY (HEMOCOEL) IS SUPPLEMENTED BY A LONGITUDINAL
DORSAL VESSEL (MESODERMAL ORIGIN).
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THE DORSAL VESSEL IS
DIVIDED INTO:
THE DORSAL VESSEL IS
DIVIDED INTO:
A TUBULAR, MULTI-CHAMBERED,
CONTRACTILE HEART (ABDOMINAL)
A DORSAL AORTA (THORACIC)
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OPEN CIRCULATORY SYSTEM
OPEN CIRCULATORY SYSTEM
CLOSED CIRCULATORY SYSTEM
CLOSED CIRCULATORY SYSTEM
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BLOOD ENTERS THE HEART VIA
PAIRED OPENINGS
CALLED OSTIA
BLOOD ENTERS THE HEART VIA
PAIRED OPENINGS
CALLED OSTIA
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THE INSECT HEART IS SUSPENDED MID-DORSALLY IN THE
ABDOMINAL CAVITY BY A SERIES OF PAIRED ALARY
MUSCLES AND A MEMBRANOUS
DORSAL DIAPHRAM.
THE INSECT HEART IS SUSPENDED MID-DORSALLY IN THE
ABDOMINAL CAVITY BY A SERIES OF PAIRED ALARY
MUSCLES AND A MEMBRANOUS
DORSAL DIAPHRAM.
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HEMOLYMPH IS PUMPED FORWARD
THROUGH THE AORTA AND ENTERS THE
HEMOCOEL AT THE BASE OF THE INSECT
BRAIN.
HEMOLYMPH IS PUMPED FORWARD
THROUGH THE AORTA AND ENTERS THE
HEMOCOEL AT THE BASE OF THE INSECT
BRAIN.
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HEMOLYMPH THEN FLOWS POSTERIORLY AROUND THE GUT (PERIVISCERAL SINUS) AND VENTRAL NERVE CHORD (PERINEURAL SINUS)
VIA A MEMBRANOUS VENTRAL DIAPHRAM.
HEMOLYMPH THEN FLOWS POSTERIORLY AROUND THE GUT (PERIVISCERAL SINUS) AND VENTRAL NERVE CHORD (PERINEURAL SINUS)
VIA A MEMBRANOUS VENTRAL DIAPHRAM.
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HEMOLYMPH FLOW IS
ASSISTED BY LOCOMOTORY
MOVEMENTS AND ABDOMINAL
CONTRACTIONS.
HEMOLYMPH FLOW IS
ASSISTED BY LOCOMOTORY
MOVEMENTS AND ABDOMINAL
CONTRACTIONS.
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HEMOLYMPH CIRCULATION MAY ALSO BE ASSISTED BY ACCESSORY PULSATING MEMBRANES
(WINGS AND APPENDAGES).
HEMOLYMPH CIRCULATION MAY ALSO BE ASSISTED BY ACCESSORY PULSATING MEMBRANES
(WINGS AND APPENDAGES).
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HEMOLYMPH FLOWS DORSALLY THROUGH
THE DORSAL DIAPHRAM AND INTO
THE PERICARDIAL SINUS.
IT REENTERS THE HEART THROUGH
PAIRED OPENINGS CALLED OSTIA.
HEMOLYMPH FLOWS DORSALLY THROUGH
THE DORSAL DIAPHRAM AND INTO
THE PERICARDIAL SINUS.
IT REENTERS THE HEART THROUGH
PAIRED OPENINGS CALLED OSTIA.
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INSECT INSECT HEMOLYMPH HEMOLYMPH
DOES NOTDOES NOT CARRY CARRY
OXYGEN TO OXYGEN TO ORGANS AND ORGANS AND
TISSUES TISSUES
INSECT INSECT HEMOLYMPH HEMOLYMPH
DOES NOTDOES NOT CARRY CARRY
OXYGEN TO OXYGEN TO ORGANS AND ORGANS AND
TISSUES TISSUES
OPEN CIRCULATORY SYSTEM VS TRACHAEL SYSTEMOPEN CIRCULATORY SYSTEM VS TRACHAEL SYSTEM
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Insect Blood Cells
• Hemocytes– Prohemocytes
(pluripotent & clotting function)
– Plasmatocytes(phagocytic)
– Granulocytes(phagocytic
• Phagocytosis
• Encapsulation
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Insect Infection ResponseThere are no hemocytes equivalent to mammalian
lymphocytes.
Thus there are no serum proteins equivalent to immunoglobulins (antibodies).
However, there are substances present and/or inducible that may have anti-infective qualities:
Lectins – sugar specificity, agglutinate microbesCecropins – protein disrupt microbe cell membranesVarious hemolymph enzymes
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CIRCULATING HEMOLYMPH FACILITATES:CIRCULATING HEMOLYMPH FACILITATES:
HYDROSTATIC LOCOMOTION
INFLATION OF WINGS AND EXOSKELETON
RETENTION AND DISSIPATION OF HEAT
PHAGOCYTOSISENCAPSULATION
NUTRIENT DISTRIBUTION WASTE REMOVAL
ECDYSIS