Please enable JavaScript.
Coggle requires JavaScript to display documents.
transport in the body 2 (pulse (when blood is pumped through the arteries…
transport in the body 2
-
the heart
the heart is the size of a clenched fist and located between the middle and the left hand side of the chest
the heart is made of a special type of muscle called cardiac muscle. cardiac muscle is very strong and does not tire easily
the heart contracts in order to pump blood around our body in blood vessels. the force of this blood causes a pulse
structure of the heart
chambers
the heart contains 4 chambers. the top two are the right and left atrium and the bottom two are the right and left ventricle
-
heart valves
valves in the heart make sure that the blood can flow only in one direction. in this way, they are simuilar to valves in a car tyre or football
-
-
The two blood circuits
-
in the longer body circuit, blood flows from the heart to the rest of the body and back to the heart again
pulse
when blood is pumped through the arteries it causes a wave of pressure. this wave of pressure is called a pulse
a pulse can be felt in areas of the body where the arteries are close to the surface for example at the wrist and in the neck
-
-