Answer:
its A
Explanation:
because digestive systems has to do with food such as solid and liquid one you do a swallow the food goes through your digestive system
Joints in both the skull and in the elbow move. however if you break a join in your elbow you will most likely survinve. if you break one in your skull you have a higher chance of death then you would if it had been your elbow.
Every cell in your body has the same genes/DNA but, the gene expression process decides which genes are active in which cells which is how each cell type gets it properties.
