Isaiah Schultz » Information » Human Digestion

Human Digestion

The animal and its home

The animal I am writing this post about is the same type of animal that is reading this post. They have lots of hair on head (more than anywhere else). They have flesh skin, they wear clothes and live in houses.

What it eats and how it catches prey

What we eat depends on what we feel like.

Fish: we use fishing rods or nets for fishing.

Vegetables: we grow vegetables until they are ready.

Fruit: we grow fruit until it is ripe.

Products that can not be found in the wild: we buy things from the shop.

Digestion process

You breathe in through your windpipe but do not swallow through it. Food is broken down in the stomach: it then enters the small intestine as a thick liquid where it mixes with juices, (not from the last meal), from the pancreas and gall bladder, which is under the liver, and is absorbed into the blood. Undigested food is kicked out of the body. Cells need oxygen to break down and release the energy in food. Oxygen is taken into the body through the nose, wind pipe, and trachea, and two lungs. You take in oxygen from the air when you breath in, and you breath out waste carbon dioxide. The liver is a large gland which processes amino acids and stores vitamins and glycogen, (used to make glucose when needed): it also makes bile, used to digest fats and removes poisons from the blood, remove waste from the liver, and send it as urine to the ureter.

Teeth

Teeth prepare food for swallowing and digestion. Some teeth are cutters (incisors), others grinders (molars). A tooth has three main layers: the outer is made of hard enamel, to make it stronger and offer protection, underneath lies hard dentine, over an inside pulpy part, which has nerves and blood vessels.

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