Answer:
The baby starts breathing
Explanation:
While in the womb, a fetus has its oxygen delivered to it, and the waste products removed (all via the mother's bloodstream), so there is no reason to separate all the chambers of the heart while still in the womb.
However, once the baby is born and it is breathing, the chambers need to differentiate in order to allow the blood to reach the lungs, and the oxygenated blood and deoxygenated blood do not mix.
True seems like the best answer. Players have trouble with the reverse swinging motion. The grip change of the racquet is more than likely the reason. There is more than one kind of backhand stroke.
Answer:
Reticular activating system
Explanation:
The reticular formation refers to the network of neurons formed through the neurons of the brainstem and medulla.
The reticular system is not an anatomical structure but is present in the brainstem of the brain. The reticular formation on the upper side form the reticular activating system and on the lower side has the nerve fibres of the spinal cord.
The reticular system controls the consciousness ad arousals like mood and sleep.
In the given question, the sleep of the professor, therefore, could be due to the slow firing in the reticular formation.
Thus, Reticular activating system is the correct answer.
Reticular formation- brain stem structure associated with sleep, arousal, attention
