post 26 - Circulatory system 2

What is the job of the Circulatory System

The Circulatory System is responsible for transporting materials throughout the entire body. It transports nutrients, water, and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce. It is an amazing highway that travels through your entirebody connecting all your body cells

Heart

The Heart is an amazing organ. The heart beats about 3 BILLION times during an average lifetime. It is a muscle about the size of your fist. The heart is located in the center of your chest slightly to the left. It's job is to pump your blood and keep the blood moving throughout your body.

post 25 - Circulatory system 1

Hi
I really in mood today but I'm little worry about my new exam so at first thanks 4 coming and if you came here to learn something I should begin to teach :) I really like this chapter because its comes to our hearts we should know what causes our hearts work in good status I think if we always try to make people happy our hearts working in the kind way and be healthy now we should thinking more about our hearts , where is it? how is our heart building?and something else
at first you can see this photo and imagine your heart

The name of heart cover is pericardiu and its formed by : fibrous pericardium , visceral pericardium & parietal pericardium
The heart wall is formed by : epicardium , myocardi & endocardium