Human Biology I Course Description

Monday, August 13, 2012


3 Feb.  Description and drawing of the eye from without.  Why is the iris of a baby frequently blue, even when its eyes will be brown later?

 4 Feb. Why is the pupil black? Drawing: Saggital Section of the Eye

 5 Feb.  The path of the light through the eye.  Short explanation of parts of the eye named.  Seeing far and near:  the working together of ciliary muscle, radial fibers and lens (with sketches).

 6 Feb.  Sketches of corrective lenses for the near and far sighted.  Drawing of the Retina.  Description of rods, cones; ratios of rods and cones to ganglion cells and why this is important.  Disappearing weak star.

 9 Feb.  Rhodopsin.  Drawing of six extrinsic eye muscles. Description of what kind of eye movement each muscle causes. Coordinating both eyes to avoid seeing double.  Strabism.

Feb. 10 – 11. Eye Development in Humans and Squids.  Seeing the same image in different ways (with handouts).   Handouts + dictation: “There is more to seeing than meets the eye.”  Eye ailments.

 Feb. 12- 13.  Comparison of seeing and hearing. Overview of the ear (with drawing). Path of sound through the ear.  Middle ear (+ drawing). The “Cable Car”, “Stilletto,” and “Rock Concert” effects.

Feb. 16.  Vertical Section of the Cochlea.  Explain how sound waves passing through Cochlea cause the Organ of Corti and its hair cells to create nerve impulses to brain.  Spiral sketch showing sensitivity in the cochlea to different sound frequencies. Table of maximum frequencies heard by humans and some animals. Table of frequency loss with age for humans.  Directional hearing.

 Feb. 17.  The sense of equilibrium (balance). How does our body react if we spin around too much at an amusement park.  Three semicircular canals and how they function (w. sketch). Ampula sketch and explanation.  Utriculus (+ drawing). Dictation.

 Feb. 18.   Proprioception (sense of movement).    Left handed writing.  Sensing forms (w. sketches and handout). Muscle Spindles (+ drawings).









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