BS CHEMISTRY 1ST SEMESTER
AMBER ASIF
23042
ZOOLOGY:
PHYLUM ARTHROPODA
INTRODUCTION:
• Largest Phylum BODY DIVISIONS:
• Commonly known as arthropods
Body divide in distinct regions:
• ARTHRO 👉🏼joined .
• PODS 👉🏼 feet .
• The head
HABITAT : • Thorax
• Live in all type of environment. •
• On land . Abdomen
• In water .
• In air.
STRUCTURE:
• Have Different shape .
• Worm like.
• Flying insect.
, BODY STRUCTURES
GERM LAYERS:
• Triploblastic organisation.
SYMMETRY:
• Bilateral symmetry.
SEGMENTATION:
• Body is segmented. Each body segments attached to its neighbour by mean of a modified portion of cut
which is thin and flexible.
APPENDAGES:
• Appendage are jointed
• Have been MODIFICATIONS
BODY CAVITY:
• Homoceal.
SENSE ORGAN:
• A pair of compound eyes .
• Antennae .
SKELETON:
👉🏼Exoskeleton 👉🏼outer covering. 👉🏼 Cuticle. 👉🏼 Lightweight 👉🏼made up of chitin.
COMPOSITION 👉🏼chitin is non cellular, non living, secreted by the underlying epidermis.
👉🏼made of polysaccharide. 👉🏼waxy layer .
👉🏼In some arthropods, chitin is soft and flexible. 👉🏼And other are hard.
👉🏼Chitin in Jaws is used for biting and crushing food
👉🏼Also forms lens of the compound eyes the copulatory organ ,organ of defence and offenc
AMBER ASIF
23042
ZOOLOGY:
PHYLUM ARTHROPODA
INTRODUCTION:
• Largest Phylum BODY DIVISIONS:
• Commonly known as arthropods
Body divide in distinct regions:
• ARTHRO 👉🏼joined .
• PODS 👉🏼 feet .
• The head
HABITAT : • Thorax
• Live in all type of environment. •
• On land . Abdomen
• In water .
• In air.
STRUCTURE:
• Have Different shape .
• Worm like.
• Flying insect.
, BODY STRUCTURES
GERM LAYERS:
• Triploblastic organisation.
SYMMETRY:
• Bilateral symmetry.
SEGMENTATION:
• Body is segmented. Each body segments attached to its neighbour by mean of a modified portion of cut
which is thin and flexible.
APPENDAGES:
• Appendage are jointed
• Have been MODIFICATIONS
BODY CAVITY:
• Homoceal.
SENSE ORGAN:
• A pair of compound eyes .
• Antennae .
SKELETON:
👉🏼Exoskeleton 👉🏼outer covering. 👉🏼 Cuticle. 👉🏼 Lightweight 👉🏼made up of chitin.
COMPOSITION 👉🏼chitin is non cellular, non living, secreted by the underlying epidermis.
👉🏼made of polysaccharide. 👉🏼waxy layer .
👉🏼In some arthropods, chitin is soft and flexible. 👉🏼And other are hard.
👉🏼Chitin in Jaws is used for biting and crushing food
👉🏼Also forms lens of the compound eyes the copulatory organ ,organ of defence and offenc
