What are motor skills? You might hear about the development of fine and gross motor skills in the pediatricianâs office, parenting magazines or a baby development book. What exactly are they? This is actually a pretty complicated question.
The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s. In this theory the internal contents of cells were called protoplasm and described as a jelly-like substance, sometimes called living jelly.
Anton van Leeuwenhoek. Or, Both: In 1665 Robert Hooke observed and reported many little boxes that looked like cells where monks lived. He was observing the remains (non â¦ living) of cork cells. He coined the phrase cell. It was Anton van Leeuwenhoek who first observed and wrote about a living cell.