The Cardiovascular System During Exercise. Mr. P. Leighton GCSE PE

By the end of the lesson… All of you: Will understand the principle parts of the Cardiovascular System. Most of you: Will understand the key terms of HEART RATE, BLOOD PRESSURE, SYSTOLIC and DIASTOLIC PRESSURE. Some of you: Will begin to understand the IMMEDIATE and SHORT TERM effects of exercise on the body.

What is the CARDIOVASCULAR SYSTEM… Look on you paper- circle the key parts of the CV System…

The Cardiovascular System… The CV system includes THE HEART, BLOOD and BLOOD VESSELS. The Lungs play an important part also. The HEART is best described as A MUSCULAR PUMP. The Bloods main functions are… –To supply the body with O 2 and Nutrients. –To remove waste products such as CO 2 and LACTIC ACID.

So What happens during exercise? Exercise has a number of IMMEDIATE effects upon the CV System. Increased HR Release of ADRENALINE Increased O 2 uptake Eating before Exercise?

What are your Heart Rates? Take your pulse now (Resting HR) What was it? ____________ BPM Take your pulse now (HR after Activity) What was it? ____________ BPM

Systole and Diastole… Your heart makes two distinct noises when it beats… Systole _____________. Diastole _____________. Your BLOOD PRESSURE is a combination of the two- it is the force exerted on the walls of the arteries.

So what is… HEART RATE __________________________________ _______________________. BLOOD PRESSURE __________________________________ ______________________.

Think back to being outside… What were the immediate effects on your body because of exercise? _______________________

The Immediate physiological effects of exercise on the body. Breathing becomes faster and deeper. Why? _____________________________. Challenge…

Body temperature increases… Muscles get warmer in activity- causing the whole body temperature to rise. What is the average human temperature? Guess_____ Answer: ______ A: How is temperature regulated? A: Sweating Q: Why do we shiver?

Sweating starts and the body requires fluid. Sweat comes from _______________________________. Energy in the form of heat is needed for it to evaporate. As heat is lost and energy is expended… ______________________________. What else is lost? A: _________

Under normal conditions the body regulates water… Amount of water in Amount of water out Amount of food And drink in Amount of urine And sweat out

What else is lost when sweating? Salts must be replaced during and after exercise- otherwise __________ and ___________ can occur. What happens in sports to counteract this?

Muscles begin to ache. In order to work muscles need _______ and ________. Energy comes mainly from food- specifically G__________. The process of getting energy is called __________.