Ff Sense of Sight

A number of accessory organs assist the visual receptors, which are in the eyes. These include the eyelids and lacrimal apparatus that help protect the eyes and a set of extrinsic muscles that move them.

Figure

Equilibrium Ear

The macula responds to changes in position of the head. (a) Macula with the head in an upright position. (b) Macula with the head bent forward.

Figure

The macula responds to changes in position of the head. (a) Macula with the head in an upright position. (b) Macula with the head bent forward.

Utricle And Saccule Electron Microscope
Scanning electron micrograph of hairs of hair cells, such as those found in the utricle and saccule (8,000x).
Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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