They are genes.
They are genes.
cell
Today, those units of hereditary information are called genes. Genes are segments of DNA that encode specific traits or characteristics and are passed down from parents to their offspring.
for this reason ceall are called structural and functional units of life
genes
Functional Units
DNA and RNA contain functional units known as nucleotides, which are composed of a sugar, a phosphate group, and a nitrogenous base. ATP (adenosine triphosphate) contains functional units called phosphate groups, which are crucial for the transfer of energy in cells.
It is known as the nephron.
The functional units of the Roman water-carrying system were called aqueducts.
Alveoli
Repeating units of actin and myosin filaments are called sarcomeres. These are designed to control the contraction of muscles in the human body.
Because they are the lining of the lungs that begin the process of taking oxygen out of the air and into the blood stream. They are the parts that actually coe into contact with the "air" and are therefore called the functional part of the lungs.