TOPIC

human

Human biology is the study of the human body, how it functions, and how its different systems work together to keep us alive and healthy. It explores cells, tissues, organs, and systems that make up our body. Cells and Tissues: The human body is made up of trillions of cells, which are the basic units of life. Different types of cells group together to form tissues. There are four main types of tissues: epithelial (covering surfaces), connective (support and structure), muscle (movement), and nervous tissue (communication).