review for lab practical
TRANSCRIPT
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review for lab practical I
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Hemichordate
• Kingdom: Animalia. Phylum: Hemichordata. Class: Enteropneusta. Genus: Balanoglossus.
• Acorn worm• Dioecious – separate male and
female
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Can you find the……
Proboscis
Proboscis coelom
Collar Collar coelom
Dorsal blood vessel(and nerve)
Ventral blood vessel(and nerve)
Stomochord
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This is a cross section of? Balanoglossus pharynx
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This is a cross section of….?Balanoglossus intestines
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Figure 2.2 aFigure 2.2 b
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Urochordata
• Phylum Chordata. Subphylum Urochordata. Class Ascidiacea.
• Tunicates• Ecteinascidia• Monoecious = one house– Both male and female parts in one organism.
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Can you find the…?
•Buccal/Incurrent siphon
•Atrial/excurrent siphon
•Tunic
•Stomach
•Intestine
•Rectum
•Anus
•Testes
•Ovary
•Pharynx
•Pharyngeal slits
•Endostyle
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Incurrent/Buccal SiphonExcurrent/Atrial siphon
Tunic
Anus
Rectum
Ovaries
Stomach
Pharynx
Pharyngeal slits
Endostyle
Testes
Intestine
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??
??
??
??
Also note: Excurrent and Incurrent siphonsBranchial basket w/ pharyngeal slits Adhesive papilla
??Post Anal tail
??
??
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Esophagus
Testes
Ovaries
Intestine
Stomach
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Stigmata
Endostyle
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Cephalochordata
• Phylum: chordata, Subphylum: cephalochordata, Class: Leptocardii
• Amphioxus • Lancelets
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Find the…
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Find the…
•Dorsal hollow nerve cord
•Notochord
•Wheel organ
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Male or female?Female
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Find the…• DHNC
•Notochord
•Pharynx
•Endostyle
•Gonad
•Segmental muscle
•Dorsal fin
•Epibranchial groove
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What is… 1. Dorsal fin
2. DHNC
3. Notochord
4. Intestine
5. Ventral fin
** If you can see the dorsal AND ventral fins, Chances are it’s an intestinal region!!
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Identify: 1. Dorsal fin2. Dorsal nerve cord3. Notochord4. (Rostrum) 5. Oral hood6. Wheel organ7. Oral Cirri8. Velum
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Agnathans
• Phylum: chordata, Subphylum: Vertebrata, Class: Cephalaspidomorphi, Order: Petromyzontiformes, Genus: Petromyzon
• Jawless• Lampreys
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External features to identify:
Nostril
Caudal Fin
Tail Dorsal fins
Trunk
External gill slit
Eye
Buccal Cavity
Where the pineal gland should be.
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What can you identify?
**Hypophyseal pouch
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Identify…
Spinal cord
Notochord
Caudal artery
Caudal vein
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Spinal cord
Notochord
Esophagus
BranchialTube
Ventral aorta
Gill Laminae
Anterior Cardinal
Vein
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Olfactory sac
Hypophyseal pouch
Cranial cartilage
Carotid artery
Eye
Eye muscle
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Papillae
Tooth
Tongue
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Notochord
Posterior cardinal vein
Liver
Dorsal aorta
Spinal cord
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Testes
Myomeres
Liver
Intestine
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Male. Testes. Female. Ovaries.
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Eye spotEar vesicle
Gill slits
VelumOral tentacles
Procencephalon
**Look for the eye spot.**
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NotochordNerve cord Dorsal fin
IntestineEsophagusGill slits
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