A cell is the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane.

The difference between a plant and animal cell is that a plant cell is a cell that differs in several key aspects from the cells of other eukaryotic organisms and an animal cell is the membranes of organelles.

The two main functions of a muscle cell are to produce movement through force and to maintain posture.

Nerve cells transmit messages from one part of the body to another.

White blood cells defend against infection, while red blood cells carry oxygen throughout the body and take carbon dioxide out of the body.

The Cardiac muscle fiber cell goes to the Cardiac muscle tissue and then that goes into the Heart and then that goes through the Cardiovascular system.

The respiratory system in a human gives oxygen to the body and its organs which includes the heart pumps blood throughout the body. When the heart pumps blood that is called the circulatory system which provides blood for the digestive system which processes nutrients that are consumed by the body and eliminates left over waste.