Edited Invalid date
34.1 Digestive Tracts -- Part 1
Estimates vary, but ruminants account for about 15-20% of the global production of methane, an important contributor to climate change.
Medical experts believe that a diet with too much red meat is an important factor in many diseases.
One of the most important things we can do to maintain good health is to eat a well-balanced diet.
Discuss some of the differences between omnivores, herbivores, and carnivores.
Digestion provides the body with the vitamins and minerals it needs to survive.
A digestion system ingests food, breaks it down into small molecule that can cross the blood-brain barrier, and absorbs and eliminates undigestible remains.
The majority of animals have a stomach, but some have no stomach at all.
Planarians have an incomplete tract.
It begins with a mouth and muscular pharynx, and then the tract, which is a part of the body.
Planarians have a single opening that acts as both an entrance and an exit.
Planarians rely on digestion to complete the process.
A vacuole is produced by phagocytosis.
The digested products pass from the vacuole to the cytoplasm.
Planarians mainly feed on smaller, aquatic animals and bits of organic debris.
The pharynx extends beyond the mouth when a planarian is feeding.
The pharynx sucks up small quantities at a time as the body is wrapped around the prey.
Extracellular digestion can occur because of the digesters in the tract.
Digestion is finished by the cells in the tract.
The cell in the body is not far from the stomach.
The lack of specialized parts in the bicyle of a planarian is notable.
It is saclike because the pharynx is an entrance for food and an exit for undigestible material.
The evolution of more specialized parts, such as those seen in complete tracts, can be minimized by using the same body parts for more than one function.
Planarians have modified relatives.
Tapeworms don't have a digestive system.
The tapeworm's body is covered in the juices of the host.
The tapeworm's integument and body wall are modified for this purpose.
The decayed organic matter found in the soil is what Earthworms feed on.
The pharynx has a sucking action.
The crop is a storage area with thin walls.
The gizzard is where thick walls crush the food and sand grinds it.
Digestion is a part of the body.
The remains are thrown out at the anus.
The pharynx, crop, gizzard, and intestine are the main parts of the earthworm.
The mouth and anus of a complete digestive tract can be labeled in this drawing.
An internal fold called the typhlosole is found in earthworms.
Some aquatic animals get their food by continuously passing water.
The clams are filter feeders.
The entrance of small particles is possible because of the size of the incurrent siphon.
The labial palps force the particles through the mouth into the stomach.
The amoeboid cells throughout the tract are believed to complete the process of digestion.
A clam has a different mode of metabolism than a squid.
molluscs are clams and squids.
A clam burrows in the sand or mud while a squid swims in the open waters.
The labels are shaded.
Not all filter feeders are small.
The blue whale is a baleen whale.
Baleen hangs from the roof of the mouth and filters small shrimp from the water.
The ability of continuous feeders to store food temporarily while it is being eaten allows them to spend less time feeding and more time engaging in other activities.
Squids are feeders.
Review flashcards and saved quizzes
Getting your flashcards
Privacy & Terms