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Questions and Answers
Which of the following mouthparts is the most prominent on the dorsal side of a cockroach's head?
Which of the following mouthparts is the most prominent on the dorsal side of a cockroach's head?
The hypopharynx of a cockroach is located between which two mouthparts?
The hypopharynx of a cockroach is located between which two mouthparts?
What is the function of the trochanter in a cockroach's leg?
What is the function of the trochanter in a cockroach's leg?
Which of the following is NOT a type of sensory receptor found on a cockroach?
Which of the following is NOT a type of sensory receptor found on a cockroach?
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Where are auditory receptors (for hearing) located on a cockroach?
Where are auditory receptors (for hearing) located on a cockroach?
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Which of the following segments is NOT part of a cockroach's leg?
Which of the following segments is NOT part of a cockroach's leg?
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What type of vision do cockroaches have?
What type of vision do cockroaches have?
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The first maxillae in a cockroach's mouth are located on which side of the mouth?
The first maxillae in a cockroach's mouth are located on which side of the mouth?
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What is the primary nitrogenous waste product excreted by the Malphigian tubules?
What is the primary nitrogenous waste product excreted by the Malphigian tubules?
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How many pairs of spiracles are involved in the respiratory system?
How many pairs of spiracles are involved in the respiratory system?
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Where are the testes located in the male reproductive system of a cockroach?
Where are the testes located in the male reproductive system of a cockroach?
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What is the term for the large bundle of sperms in a cockroach?
What is the term for the large bundle of sperms in a cockroach?
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What is the function of the colleterial glands in the female reproductive system of a cockroach?
What is the function of the colleterial glands in the female reproductive system of a cockroach?
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Flashcards
Circulatory System
Circulatory System
The blood vascular system in some species is open and lacunar type, allowing for the transport of fluids.
Spiracles
Spiracles
Small holes, ten pairs in total, that allow for gas exchange in certain insects.
Malpighian Tubules
Malpighian Tubules
Excretory structures that absorb nitrogenous waste and convert it into uric acid for excretion.
Spermatophore
Spermatophore
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Ootheca
Ootheca
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Labrum
Labrum
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Mandible
Mandible
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Maxillae
Maxillae
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Labium
Labium
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Hypopharynx
Hypopharynx
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Coxa
Coxa
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Trochanter
Trochanter
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Thigmoreceptors
Thigmoreceptors
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Study Notes
Veterinary Entomology and Protozoology Laboratory
- Course: VPARA 3 200 Lab
- Instructor: Dr. Michael Deither T. Agdippa
Insect Morphology - Exercise 1
- Topic: External Anatomy
- Key insect body parts (illustrated in a grasshopper diagram):
- Head
- Thorax (prothorax, mesothorax, metathorax)
- Abdomen
- Wings
- Legs (coxa, trochanter, femur, tibia, tarsus)
- Spiracles
- Coxa
- Trochanter
- Genitalia
Cockroach External Anatomy
- Topic: Exterior structure
- Key features:
- Antenna
- Compound eyes
- Fore legs
- Wings (fore and hind)
- Hind legs
- Abdominal segments
- Anal cercus
- Note: Diagram shows folded wings, prothorax, mesothorax, metathorax.
Head Anatomy
- The head is crucial to a cockroach’s functions
- Parts include:
- Antenna
- Labrum (flattened, dorsal sclerite)
- Mandibles (thick, hard triangles)
- First maxillae (side of mouth)
- Labium (fused second maxillae)
- Labial palp
- Maxillary palp
Mouth Parts
- Labrum: flattened, terminal sclerite on the dorsal side of the head capsule.
- Mandible: thick, hard, and triangular appendages below the labrum.
- First Maxillae: located on the side of the mouth next to the mandibles.
- Hypopharynx: tiny, cylindrical mouth part between the first maxillae, covered by the labrum (dorsally) and labium (ventrally).
- Labium: fused second maxillae, covering the mouth from the ventral side.
Compound Eye
-
Diagram shows the compound eye structure:
- Lens
- Cornea
- Crystalline cone
- Receptor cell
- Rhabdome
- Ommmatidia (multiple units)
-
Mosaic vision: visual perception created by the many ommatidia.
Simple Eye/Ocelli
- Detects light or dark.
Leg of Cockroach
- Parts:
- Coxa (attaches leg to the thorax)
- Trochanter (acts like a knee)
- Femur
- Tibia
- Tarsus (segmented, like ankle and foot)
Posterior Abdominal Segments
- Variations exist in male and female structures, showing distinct dorsal, ventral views.
- Parts such as anal cercus, anal style, ovipositor valve.
Digestive System
- Diagram shows the alimentary canal:
- Brain
- Compound eyes
- corpus allatum
- salivary gland
- esophagus
- visceral ganglion
- crop
- hepatic caecae
- gizzard
- mesenteron
- rectum
- Malpighian tubules
- 10th tergum
Nervous System
- Central nervous system is segmented.
- Supraesophageal ganglion
- Subesophageal ganglion
- Thoracic ganglia
- Abdominal ganglia
- Terminal abdominal ganglion
- Cercal nerve
Sensory Structures
- Types of receptors:
- Thigmoreceptors (touch)
- Olfactory receptors (smell)
- Gustatory receptors (taste)
- Thermoreceptors (temperature)
- Auditory receptors (hearing) - found on anal cerci
Circulatory System
- Open and lacunar type circulatory system.
- Blood vascular system with dorsal and ventral diaphragms.
Respiratory System
- Network of trachea.
- Openings through spiracles (10 pairs).
- Tracheae branch into tracheoles.
Excretory System
- Excretion through Malpighian tubules.
- Tubules have glandular and ciliated cells.
- Nitrogenous waste converted to uric acid.
Reproductive System - Male
- Sexes are separate (dioecious).
- Testes located in abdominal segments 4, 5, and 6.
- Sperms glued together to form a spermatophore.
Reproductive System - Female
- Consists of ovaries, vagina, genital chamber, spermathecae, colleterial glands, and female gonopophysis.
- Ovaries are in segments 2 to 6.
- Each ovary in 8 ovarioles.
- Ootheca forms around fertilized eggs.
Additional Information
- Pictures show examples of cockroach specimens and ootheca. Some may be anatomical parts for study.
- Supplies needed for future meetings: dissecting kit, styrofoam, pins, pencils, coloring materials, cockroaches.
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Description
Test your knowledge on the external anatomy of insects with this quiz focused on cockroaches and grasshoppers. You'll explore key body parts and their functions, enhancing your understanding of insect morphology in the Veterinary Entomology and Protozoology Lab course. Master the critical structures such as the head, thorax, and wings.
