Answer:
thank you
Explanation:
the earth is 4.543 billion years
and yes I searched it up :)
The spinal cord resembling a "horse tail" is called the cauda equina.
<h3>What is
cauda equina?</h3>
The collection of nerve roots descending from the spinal cord and cone of the spinal cord is called the cauda equina. The cauda equina contains nerve roots from L2 of the lumbar vertebrae to Co1 of the coccygeal spine (coccygeal end). For example, the L4 nerve root between the L4 and L5 vertebrae.
The nerves are located in the Cauda Equina section of the lower end of the spinal cord in the lumbosacral spine. Its function is to send and receive signals to and from the legs and pelvic organs.
Learn more about cauda equina brainly.com/question/29331747
#SPJ4
Explanation:
<u>Refractory period is period of the time during which organ or cell is not more capable of repeating an action. It can also be said as amount of the time, the organ takes for the excitable membrane so that it can be as ready for a second stimulus as once it returns to the resting state by following an excitation.</u>
Refractory period in the cardiac physiology is related to ion currents flow into and out of cell freely.
<u>The long refractory period of the cardiac muscle helps to excite heart before proceeding of contraction, which enables heart to pump the blood and to relax then which then to be filled with the blood in cardiac cycle.</u>
