Question

your body is made up of over 30 trillion cells. but you didnt start out that way. all humans begin as a single cell. that first cell grows and divides to form more cells.
a human begins as a single fertilized egg cell known as a zygote. a teenage human is made of millions of cells.
as the human body grows and develops, cells become specialized to do different jobs. these different types of cells are the building blocks of the organ systems that keep us alive.
complete the paragraph.
humans start out as
a single cell
a few cells
many cells
as humans develop, they
cells specialize to perform
join in the body.

Explanation:

The text states all humans begin as a single fertilized egg (zygote), which grows and divides into trillions of cells. It also notes specialized cells take on different jobs to form the body's organ systems. These details match the blanks in order.

Answer:

Humans start out as a single cell. As humans develop, they become many cells. Cells specialize to perform jobs in the body.