Final answer:
The three possible medulla patterns in humans are the defined medulla pattern, blended medulla pattern, and partial medulla pattern.
Step-by-step explanation:
Three Possible Medulla Patterns in Humans:
1. Defined Medulla Pattern:
In this pattern, the medulla of the brain is clearly distinct from the other brain regions, such as the forebrain and midbrain. The boundaries between these regions are well-defined, allowing for clear differentiation and identification.
2. Blended Medulla Pattern:
In this pattern, the medulla is more fused or blended with the adjacent brain regions. The boundaries between the medulla and other regions are less distinct, making it harder to differentiate them visually.
3. Partial Medulla Pattern:
In this pattern, only a portion of the medulla is visible or present in the brain. This could be due to developmental factors or underlying health conditions that result in an incomplete formation or presence of the medulla.