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

Units J +K – CardioVascular System co13 Units J +K – CardioVascular System

Fig. 13.4a THE HEART

Fig. 13.3a

Fig. 13.4a

Fig. 13.3b

Myocardium – Heart Muscle Cardiac Muscle tissue Myocardium – Heart Muscle What are intercalated discs?

VALVE FUNCTION

Fig. 13.4b

SKETCH A HEART

Practice (our goal) Quiz TA p259 F1 F2 R

Fig. 13.5 Cardiac Cycle

Cardiac Cycle 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 ATRIA VENTRICLES 0.15 sec SYSTOLE DIASTOLE 0.30 sec DIASTOLE SYSTOLE 0.40 sec DIASTOLE 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 EKG/ecg ELECTROCARDIOGRAM

Extrinsic Control of the heart

Nervous System Control Of the Heart

Parasympathetic = Normal Sympathetic = Emergency

Blood Pressure Monitor –AKA - Sphygmomanometer

HYPER = High TENSION = Pressure HYPERTENSION HYPER = High TENSION = Pressure

HYPO = Low TENSION = Pressure HYPOTENSION HYPO = Low TENSION = Pressure