C. Estrella

Zoology

Dissection Labs: Structures to Know for Lab Exam 4

 

Ammocoetes Larva

Diagram (drawing) in lab book (sagittal section): Oral hood, velum, pharynx, gill pouch, endostyle, esophagus, liver and gall bladder, intestine, cloacal opening, ventricle and atrium of heart, kidney, caudal fin, myotomes, notochord, spinal cord, ear vesicle, eye, forebrain and hindbrain, nostril

Cross-section at pharynx and intestine: Myotomes, spinal cord, notochord, dorsal and ventral aorta, gill bar, endostyle, intestine, typhlosole, posterior cardinal vein, coelom

Whole larval ammocoetes larva

External

oral hood, gill slits, and any fins observable.

Adult Lamprey

External

Buccal funnel, anterior lateral line system, nostril, gill slits, myotome, dorsal fins, caudal fin, pineal organ.

Internal

Buccal funnel, mouth, tongue, nostril, brain, spinal cord, notochord, dorsal and ventral aorta, pharynx, esophagus, heart, liver, internal gill slits.


Shark

External

All external structures listed in lab book.

Dermal denticle, dentine, enamel, pulp cavity, epidermis, dermis

Internal (on diagrams and/or actual dissection)

Circulatory: conus arteriosus, ventricle, dorsal and ventral aorta, afferent and efferent branchial arteries, posterior cardinal sinus, celiac artery, hepatic portal vein, anterior and posterior mesenteric arteries, iliac artery, spleen

Digestive: liver, gall bladder, mouth, esophagus, stomach, duodenum, ileum and spiral valve within, colon, rectal gland, pancreas, cloaca

Excretory and Reproductive: Kidney, testis and/or ovary, ductus deferens and/or oviduct and/or uterus, seminal vesicle (if male is present), clasper (if male is present).


Perch Anatomy

External

head, trunk, tail, eye, nostrils, mouth, operculum, gills, anus, urogenital opening(s), dorsal fins, pectoral fins, pelvic fins, anal fin, caudal fin, scales (ctenoid - slide) (compare to placoid scale in textbook).

Internal

Skeleton - axial skeleton, appendicular skeleton, vertebral column, vertebrae

Muscular System - segmental muscles, epaxial muscles, hypaxial muscles

Respiratory - gills, gill filaments, gill arch, gill rakers, gill lamellae

Coelom and Visceral Organs - coelom, peritoneal cavity, pericardial cavity, liver, esophagus, stomach, small intestine, pyloric caeca, large intestine, swim bladder, kidneys, spleen, pancreas, gonads, urinary bladder.

Circulatory System - heart, atrium, ventricle, sinus venosus, ventricle, conus arteriosus, ventral aorta, afferent branchial arteries, efferent branchial arteries, capillary beds in gills, dorsal aorta, hepatic portal system.

Male Reproductive System - testes, vas deferentia, genital sinus, genital pore

Female Reproductive System - Ovary, oviduct, urogenital pore

Nervous System - brain, olfactory tract, cerebral hemispheres, optic lobe, cerebellum, medulla oblongata

Ctenoid Scale


Frog
External: external nares, eyes, tympanic membrane
Internal:
Skeletal System

Axial Skeleton
Skull: maxilla, nasal, squamosal, frontoparietal, pterygoid, exoccipital (with occipital condyle, vomer, sphenethmoid, dentary

Cervical vertebra: atlas
Abdominal vertebrae: Be able to identify them on a frog skeleton.

Appendicular skeleton
Pectoral Girdle: Episternum, xiphisternum, scapula, suprascapula, clavicle, corocoid
Arm: humerus, radio-ulnar, carpals, metacarpals, phalanges
Pelvic Girdle: sacral vertebra, ilium, pubis, ischium, urostyle
Leg: femur, tibiofibula, calcaneum, metatarsals, phalanges

Muscular System know these muscles by location and function: Pectoralis, rectus abdominis, external oblique, sartorius, adductor magnus gracilis major, gracilis minor, adductor longus, triceps femoris, semimembranosus, gluteus, gastrocnemius, peroneus, tibialis anterior longus, tibialis anterior.

Be able to identify these muscle by location: deltoid, triceps brachii, longissimus dorsi, latissimus dorsi.

Oral Cavity
internal nares, openings to eustachian tubes, tongue.

Digestive System: liver, gallbladder, stomach, small intestine, large intestine, esophagus, pharynx, cloaca

Respiratory System: skin, external nares, glottis, larynx, bronchial tubes, lungs.

Circulatory System. heart, atria, ventricle, truncus arteriosus, sinus venosus, anterior vena cavae, posterior vena cava, pulmonary v., aortic arches, common carotid artery, carotid body, pulmocutaneous artery, R. and L. systemic a., coeliacomesenteric a., dorsal aorta, femoral artery, systemic arch, subclavian a. and v., common iliac a., sciatic a., hepatic v., renal portal v., hepatic portal v., intestinal v., mesenteric v., ventral abdominal v., pelvic v.

Urogenital System. ovary, oviduct, ovisac, vasa efferentia, testis, sseminal vesicle, kidney, ureter, urinary bladder.

Nervous System
Brain. olfactory lobes, cerebral hemisphere, optic chiasma, optic lobes, cranial nerves 1, 2, and 8, diencephalon.
Nerves. spinal, sciatic


Fetal Pig

External: head, neck, trunk, tail, external ear, eyes, nose, tongue, digit, elbow, umbilical cord, knee, ankle, forelimbs, hindlimbs, vibrissae, snout, cranium, digits, vertebral regions (cervical, thoracic, lumbar, sacral, caudal), nipples (mammae), urogenital opening, scrotum, genital papilla

Internal

Skeleton: (cat):
Vertebrae (cervical, thoracic, lumbar, sacral, caudal), skull, atlas, axis, clavicle, sternum, ribs, scapula, humerus, radius, ulna, carpals, metacarpals, phalanges, femur, patella, fibula, tibia, calcaneus, tarsals, metatarsals, innominate (ilium, ischium, pubis).

General Internal Anatomy:
thoracic cavity, abdominal cavity, diaphragm, thymus glands, thyrod gland, heart, lungs, liver, stomach, spleen, small and large intestine, cecum, urinary bladder, peritoneum.

Digestive System:
parotid salivary gland and duct, tongue, teeth, hard palate, soft palate, pharynx, glottis, esophagus, stomach, duodenum, jejunum, ileum, colon, cecum, rectum, liver, gallbladder, cystic duct, common bile duct, pancreas.

Urogenital system: kidney (capsule, cortex, medulla), ureter, urinary bladder, urethra, urogenital opening.

Reproductive System:
female: ovaries, uterine tubes, uterine horns, body of the uterus, vagina, urogenital sinus.
male: scrotal sac, epididymis, spermatic cord, ductus deferens, inguinal canal, penis seminal vesicles, bulbourethral glands.

Circulatory System:
Heart: R. and L. atria and auricles, R. and L. ventricles, coronary a., pulmonary trunk, L. pulmonary artery, ductus arteriosus (fetal pig heart), aorta (arch), brachiocephalic a., R. subclavian a., anterior and posterior vena cava, AV valves, semilunar valves.

Blood vessels: common carotid a., internal jugular v., umbilical v., umbilical a., renal a. and v., brachiocephalic a. and v., R. and L. subclavian a. and v., hepatic v., hepatic portal v., abdominal aorta, coeliac a., cranial mesenteric a., external iliac a., cranial (anterior) and caudal (posterior) vena cava.

Fetal Structures: foramen ovale, ductus arteriosus, ductus venosus, umbilical v., umbilical arteries. What do these structures become after birth?


Sheep Brain
olfactory bulbs
optic n.
optic chiasma
cerebrum
cerebellum
pineal gland
pons
medulla oblongata
longitudinal fissure
trigeminal n.
massa intermedia (intermediate mass of the thalamus)


Pig Heart
R/L Ventricles
R/L Atria
Tricuspid valve
Bicuspid valve
Pulmonary semilunar valve
Aortic semilunar valve
Aorta
Pulmonary artery
Anterior Vena Cava
Posterior Vena Cava
Pulmonary veins