The heart is made up of cardiac muscle, which is a type of striated muscle.
the cardiovascular system.
muscle tissue
it pumps blood threw your heart
Heart and Pericardium Arteries and Veins
muscle tissue
Yes, the aorta is the largest artery in the body. And it is within the cardiovascular system.
Blood is found within the cardiovascular system of the body. Therefore, it is found in the blood vessels and heart. Blood remains within this closed system.
Immunology, which could also be included within the cardiovascular system, nervous system, and endocrine system.
It could take days for certain muscle relaxers to leave your system. Most muscle relaxers will leave your system within 24 hours.
Muscle contractions in the human body are caused by the interaction between proteins called actin and myosin within muscle cells. When a signal from the nervous system triggers the release of calcium ions, it allows these proteins to bind together and generate the force needed for muscle movement.
The cardiovascular system is entirely confined to body. It has no outside connections. It is the closed system.
Because if it wasn't you would have massive internal bleeding, be extremely cold and die within seconds, imagine your circulatory system is like central heating which is also a closed system ,what would happen to the water if it didn't go round and round? You would have very soggy floors and a cold house - same thing with your body :D