In the human body, systems are made of a group of organs (D).
Here's a breakdown to explain:
1. Organs: Organs are structures made up of different types of tissues that work together to perform specific functions in the body. Examples of organs include the heart, lungs, liver, and kidneys.
2. Tissues: Tissues are groups of cells that have similar structures and work together to perform a specific function. There are four main types of tissues in the human body: epithelial, connective, muscle, and nervous tissues.
3. Cells: Cells are the basic structural and functional units of living organisms. They carry out essential processes that keep the body functioning properly. Different types of cells make up tissues, which in turn make up organs, and ultimately form organ systems.
Therefore, systems in the human body are made up of a group of organs that work together to carry out specific functions essential for maintaining overall health and homeostasis.
