Human nutrition: the digestive system (Biología 3º ESO SB)

Match each system to its description: It introduces food into the body, and prepares and transforms it to enable its use by cells.

Match each system to its description: It obtains the necessary oxygen cells need and eliminates carbon dioxide produced during cell metabolism.

Match each system to its description: It transports nutrients and oxygen to cells and releases waste substances.

Match each system to its description: It releases waste substances outside the organism.

Match each system to its description: They detect nutritional needs as well as alterations in the internal organism; they activate relevant organs to provide us with nutrients and oxyegn; they coordinate the transportation of nutrients and oxygen to the tissues that need them and eliminate waste products that alter the internal equilibrium.

Complete: Nutrients, which are found in parts of [blank_start]food[blank_end], are complex [blank_start]mixtures[blank_end] of [blank_start]substances[blank_end] that our body has to [blank_start]transform[blank_end] in order to be able to use them.

Complete: multicellular organism need [blank_start]organs[blank_end], grouped in systems, to prepare and distribute [blank_start]nutrients[blank_end] to cells and [blank_start]release waste[blank_end] products generated by cellular activity.

Complete: the gastrointestinal tract is about [blank_start]8[blank_end] metres long and its shape varies. It starts in our [blank_start]mouths[blank_end] and ends at our [blank_start]anus[blank_end].

Complete: an inner layer called a [blank_start]mucous membrane[blank_end] makes up the gastrointestinal tract. It's internally protected by a lubricant substances called [blank_start]mucus[blank_end] and it's surrounded by [blank_start]3[blank_end] musculares layers. When these layers [blank_start]contract[blank_end] they push food down the digestive tract.

Glands in the stomach produce intestinal juices and glands in the intestine secrete gastric juices.

Accessory glands are organs that discharge their secretions in the digestive system.

The accesory glands are:

Where are the salivary glands located?

Where is the liver located?

Where is the pancreas located?

The liver and the pancreas release secretions into the stomach.

Complete: digestion is the process by which [blank_start]foods[blank_end] are transformed into simples substances ([blank_start]nutrients[blank_end]), so they can be utilised by our [blank_start]cells[blank_end].