The answer is intercalated discs. They allow the heart muscle cells to function as one organ due to a phenomenon known as syncytium. This is where uninuclear cells fuse to form an apparent multinucleate cell. This way the heart muscle cells can contract in synch. Intercalated discs appear in the sarcomere's (of the muscle fibres) Z line.
This is an example of Moro reflex.
The Moro reflex is an automatic response to a stimulus that is usually present in all infants. It occurs as a response to unexpected loss of support, in which the infant have the perception of falling. The Moro reflex begins at birth, and usually disappears after 3 or 4 months. The Moro reflex involves three different parts which are; spreading out the arms, unspreading the arms, and crying.
Less triiodothyronine (T3) and thyroxine (T4) hormones are made. ... The follicle cells of the thyroid gland produce thyroid hormones while the parafollicular cells produce parathyroid hormone (PTH)
When a stimulus is being detected, this stimulus is being sent to the brain through the sensory neuron, going to the spinal cord then to the brain. The brain then interprets these stimuli, and responds to it using the motor neurons. These are the neurons that are responsible in our actions depending on the stimuli we are exposed to. Hope this helps.