00:01
Hello students and the first question we have to tell the three main type of muscle which include the skeletons from then cardiac muscles.
00:10
So let's start with the skeleton muscles.
00:22
So the skeleton muscle they attach to and move bones by contracting and relaxing in response to voluntary message from the nervous system.
00:59
And the skeleton muscles tissue is composed of long cells which are called muscle fibers that have the straighted appearance and the muscle fibers they are organized into bundles supplied by blood vessels and enough avoided by the motor neurons.
02:19
Now the second one is this was first and second is smooth muscles.
02:39
So the smooth muscle it is formed in walls of hollow organs throughout the body and smooth muscle they contract the contraction are involved the involuntary muscles sorry involuntary movements which triggered by the impulse that travel through the autonomic nervous system to smooth muscle tissue and the arrangement of the cells within the smooth muscle tissue it allows for the contraction and relaxation with a great elasticity in the smooth muscle in the wall of all organs like urinary bladder and uterus allows the organ to expand and relax as needed.
05:00
And the smooth muscles in the elementary canal, the digestive tract, so it facilitates the peristolic waves that moves the swalled food and nutrition.
05:31
And in eye the smooth muscle changed the shape of the lens to bring the object into focus.
05:50
And next we will discuss about the third which is cardiac muscles.
06:05
So the cardiac muscle, it is the heart wall which is composed of this of the three layers.
06:19
And the middle layer is myocardium which is responsible for herd pumping action.
06:45
And cardiac muscle found only in the myocardium.
06:52
It contract to response to the signal from the cardiac conduction system to make herd weight.
07:01
And the cardiac muscle is made of cells which are cardiocytis.
07:10
And like the skeletal muscle cells, the cardiocitis have the straighted appearance, but their overall structure is short and thicker.
07:38
And the cardio cytopis, they are branched, allowing them to contact with the several other cardiositis and forming a network which facilitates the coordinated contraction...