What were the major contributions of hooke and leeuwenhoek to cell biology?

Robert Hooke is best known for his discovery of cells in 1665 when he observed cork under a microscope and coined the term "cell" to describe the tiny, box-like structures he saw. Antonie van Leeuwenhoek, often referred to as the "father of microbiology," improved the microscope's design and was the first to observe and describe single-celled organisms, sperm cells, and bacteria in the late 17th century. Together, their work laid the foundational understanding of cell structure and the diversity of microscopic life, significantly advancing the field of cell Biology.