Question

Human microbiota resides in the

a. intestines.
b. kidneys.
c. liver.
d. cerebral spinal fluid.

Answer 1

The human microbiota, which includes a diverse range of bacteria, archaea, and fungi, predominantly resides in the intestines, notably in the large intestine.

Step-by-step explanation:

Human microbiota resides primarily in the intestines, making option (a) the correct answer. The human intestines are home to a vast array of microorganisms, including a diverse species of bacteria, archaea, and fungi. Particularly notable are the Bacteroides and Firmicutes bacteria. These microbes play an essential role in digesting food molecules that humans cannot break down on their own, thus aiding the metabolism. They are considered part of the gut microbiome or the "forgotten organ" because of their significant size and impact on human health. The large intestine, or colon, hosts a particularly abundant and diverse microbiota which includes Bacteriodetes and Firmicutes, among others. These microbes not only help in digestion but also produce vital nutrients such as vitamins B12, folate, and riboflavin, as well as vitamin K, which is crucial for blood coagulation.

Answer 2

The human microbiota is the aggregate of microorganisms thatresides on or within any of a number of human tissues and biofluids including the skin mammary glands placenta seminal fluid uterus ovarian follicles lung saliva oral mucosa conjunctiva and gastrointestinal tracts.