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The Digestive System of a
Transcript of The Digestive System of a
The Digestive System of a
Organs of the Digestive System
: Located externally in their face used to reach
further in a flower to grasp nectar. The beak is not hollow and has an upper and lower portion like almost any bird. The upper and lower portion are covered in rhamphotheca, and the whole beak is made from a keratin material.
Organs of the
Small Intestine: Here, the nutrients from food and nectar are absorbed by the circulatory system and the body. It is about 5cm.
A presentation by:
Special thanks to Karen Blesgraeft and Patricia Escobar
Alan Andrade P:1
The Digestive System of a Hummingbird is divided into three sections: The first part, the oral machinery, that is composed of the beak, the salivary glands, the tongue and taste buds. The second part is the esophagus, duodenum, the crop and the gizzard The last part is the small and large intestine, and the cloaca.
*Numbers listed below each information and picture are the reference for the MLA citation.
: Are glands with ducts that produce saliva and produce amylase, an enzyme that helps down break starch into maltose, located beneath inside the tongue.
: The tongue is long and it is shaped in a "W" shape. In it's tip there are brushy hairs that help pull inside the nectar of a flower. Hummingbirds have very few taste buds in their mouth.
Organs of the Digestive System
: The esophagus of a hummingbird
extends from its crop to its tongue, this is the tube were the food is transferred to the crop.
: It is where the food starts to be chemically digested.
is divided into the proventriculus and the ventriculus. The crop is a sac that holds food and nectar to be digested. When the crop fills, the Hummingbird rests while the crop is emptied on to the rest of the digestive system
: Basically the stomach of hummingbirds,
were solid food like insects are soaked by mucus.
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Large Intestine: Were water is absorbed again
and it is a temporary storage place for the wastes.
Cloaca: The area were feces, wastes and reproductive material like eggs and sperm are released.
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Difference from Humans
One difference, is how humans lack organs that hummingbirds have and vice-versa. For example, hummingbirds have a cloaca, and humans don't. Hummingbirds have a beak and humans don't. But also humans have a gall bladder and hummingbirds don't, as well as how humans have a rectum.
Another difference is how the process in both
mammals is different, and how the time it takes for both processes it obviously not the same.
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Diet of Hummingbirds
Hummingbirds principally eat tree sap, tree, flower nectar, pollen and insects. Their fast breathing rate, fast heartbeat and high body temperature require that they eat often. They also need a really big amount of food every day. Hummingbirds have a long tongue which they use to lick food at a speed of up to 13 licks per second.
Hummingbirds eat insects to recieve protein to build muscles, fats and part of their body they will need for activity, flying and migrating.
They eat nectar because it is their main source of water and sugar (they get sucrose, glucose and fructose).
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