or

VI. EXERCISE, the fourth determining force in Constructive Hygiene

A.

B.

BRIEF DISCUSSION OF THE ANATOMY AND PHYSIOLOGY OF THE NEURO-MUSCULAR
(MENTI*MOTOR) MECHANISM,

1.

Re

The Muscular System: Evolution of the system; relation to evolution of
other systems and to development and conditioning of these systems. Forms
41% (+) of total body weight; most active of tissue cells in demand for
nutrients and in transforming potential into kinetic energy; muscle
activity produces most profound changes in environment of all tissue
cells; some of the general effects of muscular activity on the muscles
and on other systems: e.g., circulatory; respiratory; alimentary or
digestive; excretory; heat regulatory; nervous.

 

Kinds of Muscle Tissue Cells, and where found in body.

 

 

 

a. Skeletal, Striated, or Voluntary Muscle.

Location: Attachment to bones; fasciae; tendons, structure of the
voluntary muscle cell; sarcolemma fibrils; sarcoplasm; blood supply;
connection with nervous system; sensory and motor nerve endings in
muscles,

Functions of Skeletal Muscles: Connection with motion and locomotion;
relation to posture; production of body temperature; storage and
oxidation of glycogen; production of lactic acid and CO» during
activity; relation to respiratory movements and to certain excretory
functions.

 

b. Smooth, or Involuntary Muscles

 

Found in walls of alimentary canal; walls of blood vessels, bladder;
ducts from glands, uterus, etc.; structure and characteristics;
effects of voluntary muscular activity on these structures,

¢, Cardiac, or Heart Muscle
LTS ER

Structure and characteristics of the cells; compare with cells of
smooth and striated muscle; characteristic of rhythmic contractabili-
ty; control of rate through nervous system; chemical factors which
influence rhythm; "all or none" theory of contraction.

THE NERVOUS SYSTEM

Anatomical and physiological considerations.

i.

Re

The great coordinator of all bodily activities; relation to neuro-
muscular (menti moter) mechanism: one unified system, but divided for
purposes of discussion and understanding; the neurons, or nerve-tissue
cells; characteristic forms of these cells; specialized to receive,
transform, cr transmit stimuli, affector, effector, and association
neurons within the system.

 

 

Main Divisions of the Nervous System

 

 

a. Central (or Cerebro-Spinal) includes cerebrum, cerebellum, medulla,
and spinal cord,