Hey there!
The skin and nervous tissues develop from the ectoderm.
It sends an electrical impulse to make your heart beat. The job of a pacemaker is to artificially take over the role of your sinus node if it isn't working properly. Electrical impulses are sent by the pacemaker to stimulate your heart to contract and produce a heartbeat
Answer:
Whereas a change in a person may take 10-50 years to manifest itself, changes in the earth can take millions of years to become apparent. Also, humans may experience changes in their personalities as well as in their bodies, while changes in the earth are never psychological.
Since I can't physically insert the appropriate heading, with units, I'll make the data table below by using the information given.
Disk-----------Measurement of ZOI (mm) also acceptable is ZOI (mm)
A--------------13 ( +/- 2 mm)
B--------------8
C-------------0
D-------------9
Theres not a photo there, or like i cant see one x
