1 Vertebrate Zoology Nervous System and Sense Organ Make sure to study the materials and models on display, especially note comparisons between systems of vertebrate groups. A. Nervous System Study Fig. 22-27 -see pp. 152-154 (364-366) showing the brain in lab book; examine the sheep brains on display to find the following. Know: 1. Brain Cerebrum corpus callosum cerebellum arbor vitae medulla oblongata pons optic chiasma hypophysis = pituitary gland optic nerve infundibulum olfactory bulb sulcus-groove gyrus-bump 2. Histology – review nerve slides: a) Motor nerve cells: Study slide #15 (smear of tissue from ox spinal cord) - see Fig. 4-15A in lab book. b) Peripheral nerve: Study slide #16 (cross section and longitudinal section of peripheral nerve) see Fig. 4-15D in lab book.
Remind teacher to show kodacolor slides and overhead transparencies of nerve tissue to point out main features and histology of nerve tissue to and to explain a how a motor nerve works. (Also refer to Fig. 4-15A in lab book). Know:
- axon (takes message away from cell body) - dendrite (takes message toward cell body) - cell body - cell nucleus - nuclei of glial cell (glial cells are supporting cells) - myelin sheath - nodes of Ranvier - neurilemma (spelled neurolemma in textbook) - Schwann cell
B. Sense Organs
2 1. Ear: examine ear models on display. Read pp. 327-330 in lecture text; see Figs. 33-25, 33-26, and 33-29 in lecture textbook; parts & functions to know: outer, middle, and inner ear drum external auditory meatus cochlea semicircular canal hammer - malleus anvil – incus stirrup - stapes
oval window round window Remind teacher to use overheads to explain ear structure and how it works. 2. Eye. Cow eyes are available for dissection; have teacher demonstrate before you do your dissection-see pp. 330-333 in textbook; see Figs. 33-32 and 33-33; parts & functions to know: lens aqueous humor cornea fovea iris optic nerve retina tapetum lucidum sclera choroid layer vitreous humor ciliary body Remind teacher to use overheads to explain eye structure and how it works. Other helpful hints: 1. Note kidney model and other models are still on display/demonstration – be sure to review for
upcoming final lab exam.
2. Review for lab final exam: birds, bones, pig dissection, mammals, models, nervous system, ear, and eye. Kodacolor slides of human anatomy are also a very good review for the lab test.
3. The VCR tape of the pig dissection is also available for in-lab use.