Explain the nouns separately first:

Nucleus: The nucleus is the place where all cells reproduce. The nucleus contains chromosomes, chromosomes contain DNA, DNA is genetic material, and the nucleus is the place where cells reproduce. Moreover, when DNA replicates in the nucleus, it will be transcribed to form a new substance called messenger RNA, which flows out from the nuclear pore of the nucleus and is translated into protein by ribosomes, so it can be said that the nucleus is the center of the cell.

Somatic cells: All cells except germ cells in an organism are called somatic cells, and the way of somatic cell reproduction is called mitosis, which retains the complete genetic information of the mother cell.

Germ cells: Germ cells are sperm and eggs, which are formed by meiosis. Its genetic information is that half of parents' sperm and eggs are fertilized to form fertilized eggs, and fertilized eggs are somatic cells!

Breast cells belong to functional cells. There are some functional glands in the cytoplasm of cells, and the nucleus is very small!

Relationship: (difference and connection)

Somatic cells and germ cells are a hierarchical unit. They all contain nuclei. Somatic cells have small nuclei and many cytoplasm. Except for germ cells, all the others are somatic cells, because they are diploid. Germ cells have a large nucleus (almost 95% of the cell volume) and few cytoplasm, which is haploid and formed by meiosis.

I wonder if this answer is satisfactory?

Don't look at those high school biology questions upstairs ... meaningless!