The regulation of the heart is effected through the afferent (centripetal) and efferent (centrifugal) nerves of the heart (Fig. 7.79). The afferent nerves are: i. From the heart through the vagus nerve and from the aortic arch, the aortic nerve. ii. From the heart through the inferior cervical and first four thoracic ganglia and first four thoracic nerve roots into [...]
The properties present in other muscle are also shown by the cardiac muscle. But it shows certain special features. 1. Rhythmicity: One of the main characteristic features of the cardiac muscle is that it can initiate its own impulse rhythmically. This inherent rhythmical property is present throughout the cardiac muscle as evident from the electro-physiological studies of the single fibre [...]
In this article we will discuss about:- 1. Normal Values of Heart Rate 2. Regulation of Heart Rate 3. Mechanism 4. Factors Affecting. Normal Values of Heart Rate: In adult males - 72 per minute, the range is from 70 – 80 per minute. In adult females-the rate is slightly higher than in males. Cause may be due to: (a) [...]