Inquiry into Life Tenth Edition Sylvia S Mader

Inquiry into Life Tenth Edition Sylvia S. Mader Chapter 13 Image Slides* *See Power. Point Lecture Outline for a complete, ready-made presentation integrating art and lecture notes. Copyright © The Mc. Graw-Hill Companies, Inc. Permission required for reproduction or display.

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Fig. 13. 4 a THE HEART

Fig. 13. 3 a

Fig. 13. 4 a

Fig. 13. 3 b

Myocardium – Heart Muscle What are intercalated discs?

Fig. 13. 4 b

SKETCH A HEART

TA p 259 Practice Quiz (our goal) F 1 F 2 R

Fig. 13. 5

When walls of a chamber come together to pump blood it is known as SYSTOLE

When the walls of a chamber are relaxed and spread apart to fill with blood, this is known as DIASTOLE.

The Cardiac Cycle is the events that take place from the start of one Atrial Systole to the start of the second Atrial Systole. TIME 0. 15 sec 0. 30 sec 0. 40 sec ATRIA SYSTOLE DIASTOLE VENTRICLES DIASTOLE SYSTOLE DIASTOLE Total time required to complete one cycle = 0. 85 seconds. Therefore, a typical heart rate will be about 70 complete cycles (beats) per 60 seconds/(1 minute)

Fig. 13. 5

Controlling the Cardiac Cycle Two ways of controlling heart rate involve either Nerve Impulses or Hormones.

NODAL TISSUE Nodal Tissue is special tissue that is rich in both muscle and nerve tissue.

Fig. 13. 6 ELECTROCARDIOGRAM

Nervous System Control Of the Heart

Parasympathetic = Normal Sympathetic = Emergency

BLOOD PRESSURE Blood Pressure Monitor – AKA - Sphygmomanometer

HYPERTENSION HYPER = High TENSION = Pressure

HYPOTENSION HYPO = Low TENSION = Pressure