since a bird has no teeth to chew its food it's stomach has a special section called a gizzard which grinds the food to make the food easier to absorb in the instine
makes them better streamlined i would guess
Yes, birds are eukaryotic organisms. They have cells that contain a nucleus and other membrane-bound organelles. This distinguishes them from prokaryotic organisms, such as bacteria, which lack a defined nucleus.
Simply, without segmentation, organisms would lack means of movement, complex structure, advanced functions, and organ protection.
Most definitely. Probably much like the set on a raccoon (procyon lotor), which I consider to be their closest cousins, along with pandas. Despite popular belief, Wombles are not rodents - you don't see gnaw marks on their furniture in their burrow or on the trees on Wimbledon Common. They also lack the long tail of a rodents like mice or rats. As for proof that they have teeth? In the episode titled "The Invisible Womble" Great Uncle Bulgaria makes mention of bramble pudding noting that "the pips get stuck between your teeth".
Birds in general, including baby birds, do not smile because they lack the facial muscles necessary to form a smile expression. They use vocalizations, body language, and feathers to communicate and express emotions instead of facial expressions like smiling.
makes them better streamlined i would guess
The gizzard is a muscular organ found in birds that helps with mechanical digestion. It is tough and rough due to the thick muscular walls that grind and break down food particles. This muscular action helps birds to effectively digest their food since they lack teeth for chewing.
What organ systems do echinodermes lacking
aplasia
Deer do not have a gallbladder. Scientists have still not been able to establish why they lack this organ that's responsible for producing bile that aids in digestion.
Healthy teeth should NOT be brittle. Instead, they should have healthy enamel. A thick enamel makes teeth strong and bright white. Teeth without enough enamel look off-white or gray, and can become brittle. This lack of enough enamel can lead to tooth weakness, cracking, and breakage.
If your teeth keep chipping off, it could be a lack of calcium in your diet. Other possible reasons could be decay or lack of other nutrients in the body.
teeth
wrybill, crossbills
Aplasia is the absence of the organ with only the rudiment present Agenesis is the complete lack of the organ
lack of calcium in your body causes white stripes on teeth and nails.
It is the nucleus .Prokariyotes lack a nucleus.