/Introduction to the human body tortora pdf

Introduction to the human body tortora pdf

Body waste” and “Fecal Matter” introduction to the human body tortora pdf here. For other types of body waste, see metabolic waste.

Not to be confused with facies. This article needs additional citations for verification. Bacteria in the large intestine further break down the material. Feces are discharged through the anus or cloaca during a process called defecation.

Feces can be used as fertilizer or soil conditioner in agriculture. It can also be burned and used as a fuel source or dried and used as a construction material. The distinctive odor of feces is due to bacterial action. The perceived bad odor of feces has been hypothesized to be a deterrent for humans, as consuming or touching it may result in sickness or infection. This process requires pressures that may reach 100 mm Hg in humans and 450 mm Hg in penguins. After an animal has digested eaten material, the remains of that material are discharged from its body as waste. This means that of all food eaten, a significant amount of energy remains for the decomposers of ecosystems.

Feces and urine, which reflect ultraviolet light, are important to raptors such as kestrels, who can see the near ultraviolet and thus find their prey by their middens and territorial markers. Seeds also may be found in feces. Animals who eat fruit are known as frugivores. An advantage for a plant in having fruit is that animals will eat the fruit and unknowingly disperse the seed in doing so.