World of Microorganisms (2)

The number of body cells in a human body

Approximately 3.0 × 10^13

Definition of normal flora

Microorganisms found in organisms including humans and animals which do not cause illness

Normal flora found in the human urethra (1)

Staphylococcus sp.

Normal flora found in the human urethra (2)

Corynebacterium sp.

Normal flora found in the upper part of human respiratory tract (1)

Staphylococcus sp.

Normal flora found in the upper part of human respiratory tract (2)

Streptococcus sp.

Normal flora found on human skin (1)

Staphylococcus sp.

Normal flora found on human skin (2)

Corynebacterium sp.

Normal flora found in the human small intestine (1)

Escherichia coli

Normal flora found in the human small intestine (2)

Lactobacillus sp.