NURSING ANM AND GNM

Detailed explanation-1: -Antonie van Leeuwenhoek (1632–1723) was one of the first people to observe microorganisms, using a microscope of his own design, and made one of the most important contributions to biology. Robert Hooke was the first to use a microscope to observe living things.

Detailed explanation-2: -The existence of microscopic organisms was discovered during the period 1665-83 by two Fellows of The Royal Society, Robert Hooke and Antoni van Leeuwenhoek.

Detailed explanation-3: -Van Leeuwenhoek was one of the first people to observe cells, much like Robert Hooke. Van Leeuwenhoek’s main discoveries are: infusoria (protists in modern zoological classification), in 1674. bacteria, (e.g., large Selenomonads from the human mouth), in 1683.

Detailed explanation-4: -The first compound microscopes date to 1590, but it was the Dutch Antony Van Leeuwenhoek in the mid-seventeenth century who first used them to make discoveries. When the microscope was first invented, it was a novelty item.

Detailed explanation-5: -Leeuwenhoek looked at animal and plant tissues, at mineral crystals and at fossils. He was the first to see microscopic foraminifera, which he described as “little cockles. . . no bigger than a coarse sand-grain.” He discovered blood cells, and was the first to see living sperm cells of animals.