Which part of the brain is directly concerned with the control of the heart?

Consider the following statements regarding the human brain:
$1.$ The cerebrum has a highly convoluted surface,which provides space for more neurons.
$2.$ The medulla oblongata is connected to the spinal cord.
$3.$ The medulla oblongata contains centers for respiration,cardiovascular reflexes,and gastric secretions.
Which of the above statements are correct?

The medulla oblongata of the brain passes out through

The $Valve$ of $Vieussens$ joins the:

The hypoglossal nerves are the ....... of the spinal nerves.

The $3^{rd}$,$6^{th}$ and $11^{th}$ cranial nerves are: