Answer: The aorta
Explanation: the main blood supplier to the body branches off into two main coronary blood vessels (also called arteries). These coronary arteries branch off into smaller arteries, which supply oxygen-rich blood to the entire heart muscle.
Answer:
there is a possibility that the neuron can fire back at the potential neuron.
Explanation:
At a chemical synapses an action of potential triggers the Presynaptic neuron to the postsynaptic neuron either more or less likely to fire its own action of its potential neuron.
Answer
The Continental drift
Explanation
From a geographical perspective, the evidence is that Africa and South America might have been a single mass of land due to similar coastal alignment. In addition to that, there is similarity in mountain ranges of Buenos Aires in Argentina to those mountains in South Africa. These mountain ranges have same age and were formed by similar rocks.
Answer:
B
Explanation:
There are even 10x bigger stars than the Sun